Answer: disease causing agent is living
Explanation:
The disease-causing agent is likely nonliving, as it requires living human cells to increase in mass and number and shows no independent metabolic activity or reproduction. Its DNA content does not necessarily qualify it as a living organism since entities like viruses also contain genetic material but are considered nonliving.
Explanation:Answering whether the disease-causing agent is living or nonliving requires us to reference the characteristics of life, which usually include the ability to reproduce, grow, respond to stimuli, have an organized structure, metabolize, maintain homeostasis, and evolve over time. In the given scenario, the agent seems to be capable of replication or increasing its mass only in the presence of living human cells, suggesting that it may lack independent metabolism and reproduction, which are key characteristics of living organisms. Therefore:
The object is likely nonliving based on our criteria.Justifying our conclusion, the agent does not exhibit independent growth or reproduction, requiring living human cells to increase in mass and number. The crystal-like agent also does not change in the absence of living cells, which indicates it does not possess metabolic processes needed for life on its own.Moving back to the class criteria, the fact that it contains DNA (as evidenced by the stain turning blue in its presence) may initially suggest some sort of genetic information typical of living organisms, however, many nonliving entities such as viruses also contain genetic material but are not considered living because they cannot exist independently without a host cell. Therefore, the DNA presence isn't enough to classify it as living without other life characteristics.
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Which of these would you be most likely to find in a swamp?
O
A. Sand dune
B. Cypress tree
O
O
C. Drought-tolerant shrub
O
D. Pink-flowering goat's foot
Answer:
B
Explanation:
Answer:
B. Cypress trees
name two major types of mutations. what do they have in common? how are they different? give an example of both
Answer & Explanation:
Two major types of mutations are deletions and substitutions
Deletion occurs when the DNA replication machinery misses or removes some nucleotides, meaning some of the sequence is missing from the new DNA. This can be just one nucleotide, a few, or lots of nucleotides.
Substitution occurs when the DNA replication machinery makes the wrong sequence, substituting one or several bases for others.
Both of these mutations can be deleterious, and occur at the level of the individual nucleotide. The effects of each of them greatly depend on the location and size of the mutation.
If a small deletion occurs at a relatively unimportant region, for example a non-coding region, or a part of the coding region that is not essential to the structure or function of a protein, then the deletion might not be too problematic to the cell. On the other hand, if even a small deletion were to affect the active site of an enzyme, a binding site, or destroy a key structural residue, then the protein could not perform its function properly. Depending on the role of the protein, this could be disastrous for the cell. The same principles apply for the substitution. If the substitution replaces important nucleotides for ones that change the amino acid sequence of important sites, then the protein could not perform its function. Alternatively, some regions might be more flexible, and the substitution could be inconsequential. Another way that a substitution might not be too problematic, is if the final amino acid that resulted from the substitution was either the same, or had similar properties, to the initial amino acid that was coded for. For example, if the initial and replacement amino acids were both uncharged, as opposed to if a uncharged residue was replaced with a negatively charged amino acid. Another difference in these mutations is that a deletion can cause a frameshift mutation. Frameshift mutations occur when the "triplet" nature of the genetic code is disrupted, such that the entire sequence is affected. I.e. if you remove one nuclelotide, then everything after that is read differently, as the machinery reads it in threesThis means that the entire protein after the deletion site is incorrect.An example of a deletion mutation that causes a disease is in cystic fibrosis, where there is a deletion in the gene CFTR. The most common mutation, is a deletion of three nucleotides that causes a the loss of the amino acid phenylalanine at residue 508.
An example of a substitution mutation causing a disease is sickle cell anemia, which changes a glutamic acid to a valine in the haemoglobin protein.
Final answer:
The two major types of mutations are germline and somatic mutations, both involving DNA sequence changes but differing in heritability and impact. Germline mutations are inheritable and affect all cells of the offspring, while somatic mutations are not inheritable and only affect certain cells in the individual.
Explanation:
Major Types of Mutations and Their Distinctions
There are two major types of mutations: germline mutations and somatic mutations. Both play crucial roles in biology, but have distinctive characteristics and implications.
Germline Mutations
Germline mutations occur in the sex cells, such as eggs and sperm. These mutations are heritable, meaning they can be passed down to offspring. For example, a mutation in the BRCA gene associated with increased cancer risk is a germline mutation, as it can be inherited from a parent.
Somatic Mutations
Somatic mutations occur in other cells of the body, excluding the sex cells. These mutations are not passed down to offspring but can lead to diseases such as cancer within the individual. An example of a somatic mutation is the acquisition of mutations in the TP53 gene in a single liver cell, leading to liver cancer.
Commonalities and Differences
Both types of mutations involve changes in the DNA sequence. However, germline mutations affect the offspring's entire genome and are heritable, while somatic mutations affect only certain cells in an individual and are not heritable. Understanding the differences between these mutations is crucial for genetics and medical research.
A massive toxic spill kills off half the population of photosynthetic plankton in the ocean. What do you predict may happen to the atmosphere as a result of this event?
Answer:
The amount of oxygen in the atmosphere would decrease.
Explanation:
This is because phytoplankton have chlorophyll to capture sunlight, and they use photosynthesis to turn it into chemical energy. They consume carbon dioxide, and release oxygen. All phytoplankton photosynthesize, but some get additional energy by consuming other organisms.
By the end of prophase, each of the following has occurred except ____.
Question 7 options:
tighter coiling of the chromosomes
breaking down of the nuclear envelope
disappearing of the nucleolus
lining up of chromosomes in the cell
Answer:
D) lining up of chromosomes in the cell
Explanation:
Prophase can be described as the first stage of cell division. During this phase, The chromatin material condenses and becomes compact so that the chromosomes become visible. The nuclear envelope disintegrates and the nucleolus disappears. Hence, the choices mentioned in option A, B and C occur by the end of prophase.
Metaphase is the third phase of cell division. During this phase, the chromosomes line themselves in the centre of the cell. Hence, the lining of the chromosome does not occur by the end of prophase. This occurs during the third stage.
scientists rarely say theory is proven . they only only say whether the evidence
Answer:
Scientists rarely say that a theory is proven. They will say that whether their the evidence presented supports the theory or not. This is because a scientific theory is subjected to change. Any new evidence found in contradiction to the previous theory will lead to the formation of another theory. Hence, a theory is no proved, it is supported through evidences or experiments.
In contrast, when an evidence is proved it will be subjected to become a scientific law. A scientific law cannot be changed.
What is the role of cyclin-dependent kinases in the cell cycle?
Question 5 options:
They stop the cycle if something has gone wrong.
They catalyze the condensation of the chromosomes.
They provide the energy for the actions of the spindle fibers.
They initiate various stages of the cell cycle.
Answer:
The role of cyclin-dependent kinases in the cell cycle is "They initiate various stages of the cell cycle ".
Explanation:
Cyclin dependent kinase belong to the family of protein kinase that have been first discovered due to their role of regulating the cell cycle. They also helps in the transcription, mRNA processing and also in the differentiation of the nerve cells. A single cyclin belongs from a class of cell cycle helps in the molecule control, and when more one cyclin are there they form a group together which further helps in the progression of the cell by the help of check points.
The statements “Evolution through natural selection accounts for the huge diversity of life on Earth” is an example of a: Select one: A. Theory B. Hypothesis C. Law D.Fact
Answer:
A. theory
there is no way of knowing for sure wether this is true but there is evidence
Jake has a can of soda that is at room temperature. He places the soda can in the freezer. The next day, Jake looks in the freezer and the soda can has popped open. Frozen soda has exploded out of the top of the can. Why did the soda explode out of the can?
Answer:
Because of the pressure build up. it also expanded
Explanation:
Final answer:
The soda can exploded in the freezer because water and the dissolved CO₂ in the soda both expanded as they froze, increasing the pressure inside the can beyond its physical limits, which led to the eruption.
Explanation:
The soda can exploded because the temperature inside the freezer caused the liquid inside the can to freeze and expand. When water freezes, it expands by about 9%, and given that soda is mostly water, a similar expansion occurred. This expansion increased the pressure inside the can beyond its structural limits, leading to the explosion. Moreover, soda contains dissolved carbon dioxide (CO₂), which also expands when it cools and turns from a liquid to a solid. Due to the kinetic-molecular theory, the molecules in the soda moved more slowly in the cooler temperatures of the freezer, which made the liquid less capable of keeping the CO₂ dissolved.
This phenomenon relates to Henry's Law, which states that the solubility of a gas in a liquid is directly related to the pressure of that gas above the liquid. In cold temperatures, the gas becomes less soluble, and if the container has no room to accommodate this change in pressure, it can lead to a rupture as the gas escapes. Additionally, when the pressure of the carbon dioxide in the can drops, such as when a bottle is left open, the dissolved gas escapes and causes the soda to “go flat”. The presence of a pocket of air in containers like a glass bottle of vinegar allows for some expansion without breaking, but a tightly sealed soda can does not have this cushioning.
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Which statement accurately describes the geologic features?
The diagram shows cross-cutting relationships among rocks.
A. D occurred after B.
B. D occurred before A.
C. A formed after the horizontal layer above was deposited.
D. F formed before the horizontal layer above was deposited.
Answer:
D. F formed before the horizontal layer above was deposited.
Explanation:
The diagram represents a cross cutting relationship is a principle of the geology and states that the geologic features that cuts the other features are a younger type of feature and is given by the nicholas steno. F is a fault that cuts through the A, B, C and E.33. Cooling food requires proper temperature control. What is the best way to measure if the food is staying
cold enough?
A. Lift the containers to see if the ice is melted
OB. Use a thermometer to check the temperature of the ice water
OC. Use a thermometer to check the temperature of the food
OD. Put lids on the food containers
The best way to measure if the food is staying cold enough is to use a thermometer to check the temperature of the food
Explanation:
Those foods are called Potentially hazardous where bacteria will be held at temperatures in the danger zone, or room temperature. It is 41-degree Fahrenheit and 135-degree Fahrenheit. It means 135-degree Fahrenheit or hotter is the exact temperature for hot holding potentially hazardous food. For cold holding potentially hazardous food is 41°F or colder.
With heating and cooling we keep food move out through the danger very soon. Each and every food needs different temperature for heating and cooling. So, we should use thermometer.
which statement about sexual reproduction in flowering plants is true
Answer:
D) Asexual reproduction produces offspring that are genetically identical to the parent.
Explanation:
I am honestly not quite sure of this answer, but I was trying to read up on the topic and this is the answer I'm most confident in. It would make sense that the offspring are genetically identical to the parent because they would have no where else to get their genes/mix to form new ones. I really hope this helps!
Please help I can’t figure this out
Select all of the things that are true about photosynthesis and respiration
(Check all that apply)
1. Aerobic respiration in an efficient way to covert glucose into ATP
2. Only plants are able to use photosynthesis
3. Chlorophyll is why we see so many different colors
4. Plants do not use mitochondria because they do not need to use respiration
5. Water and carbon dioxide are reactants in photosynthesis
6. Cells can still “burn” glucose to realize energy without oxygen
7. Carbon dioxide comes out of photosynthesis
8. Respiration happens in mitochondria
9. Photosynthesis held plants make sugar
Answer:
Photosynthesis is the process in which cells use carbon dioxide and water to make glucose in the presence of sunlight.
Respiration is the process in which glucose molecules are utilized to release energy in the form of ATP.
Explanation:
Ans1- Respiration in cells occurs in mitochondria. Cells gain energy in the form of ATP. Conversion of glucose in the form of ATP is known as cellular respiration.
Cellular respiration can take place either in presence of oxygen(aerobic respiration) or in absence of oxygen(anaerobic respiration ).
Before entering into cellular respiration glucose molecule has to be converted into pyruvic acid. This process in known as GLYCOLYSIS.
Anaerobic respiration occurs in mitochondria when oxygen is not present. It is known as fermentation.It is not effective process to produce ATP from glucose as in this process only 4 ATP can be released.
Aerobic respiration occurs in mitochondria in presence of oxygen. This is effective pathway to gain ATP as it releases 36 ATP from 1 glucose molecule.
Ans2- All cells which has photosynthetic pigments are able to use photosynthesis. Example- Blue green algae, cynobacteria etc.
Ans3- We can see different shades of green colors of plants and leaves because of different types of chlorophyll present in plant. Chlorophyll are of 6 types in plant. Their types are based on the lights they absorb. Two main types of chlorophylls are chl a and chl b.
Ans4- Both plant and animal cells have mitochondria. In plant also they need energy. To get ATP from breakdown of glucose respiration is occur in plant also.
Ans5-In photosynthesis glucose is formed from water and carbon di oxide. 6 carbon dioxide and 6 molecules of water are used to make 1 molecule of glucose. Water and carbon di oxide are reactant in this process.
Ans6 - Cells without oxygen can burn glucose to release energy. This process is known as Anerobic respiration/ fermentation. But the outcome of energy is lower than aerobic respiration. ( ANS1)
Ans7- In the process of photosynthesis reactants are water and carbon di oxide. Oxygen produced released in the form of gas along with carbon di oxide.
Ans8- The enzymatic reaction of respiration occurs in mitochondria. Krebs cycle occurs in the matrix of mitochondria.( ETC electron transport chain) to release ATP occurs in cristae of inner membrane of mitochondria.
Ans9- Plants make glucose through photosynthesis . In presence of sunlight plants use carbon dioxide and water to make sugar.
the diffusion of water across a selective permeable membrane is called what
Answer:
The diffusion of water across a selective permeable membrane is called osmosis.
Explanation:
Osmosis can be described as the movement of water molecules from an area of higher concentration to an area of lower concentration through a selectively permeable membrane. As the water molecules tend to move along the concentration gradient, hence the process of osmosis is a type of passive transport. Very little or no energy will be required for the process of osmosis to occur.
In contrast, during the process of active transport, molecules move against a concentration gradient and hence require energy.
The process of water diffusion across a selectively permeable membrane is known as osmosis. It aids in the movement of water from a region with low solute concentration to a region with higher solute concentration, helping maintain balance inside the cells.
Explanation:The diffusion of water across a selective permeable membrane is known as Osmosis. In biological terms, osmosis is an essential process for the survival of organisms. It helps in the movement of water from an area of low solute concentration to an area of high solute concentration. This movement maintains the balance of water and solutes inside the cells of the organism.
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which one of the following types of muscles helps you turn your body upwards?
A. Pronator
B. Abductor
C. Adductor
D. Supinator
Answer:
Adductor
Explanation:
The answer is Adductor.
Final answer:
The supinator muscle is responsible for turning the forearm anteriorly, or upward, which is part of the supination movement where the palm faces forward.
Explanation:
The type of muscle that helps you turn your body upwards by turning the forearm anteriorly is the supinator muscle. This muscle is responsible for supination, which occurs when the palm of the hand is turned to face forward, aligning the radius and ulna in a parallel manner. On the contrary, pronation involves the palm facing backward with the radius crossing over the ulna.
The pronator muscles, such as the pronator teres and the pronator quadratus, facilitate this motion. To clarify the options given, abductors are muscles that move a limb away from the body's midline, such as the supraspinatus muscle that abducts the arm at the shoulder. Adductors bring limbs towards the body's midline, exemplified by the adductor muscles of the thigh.
What might happen if the gametes of a species had
the same number of chromosomes as the species'
body cells?
Answer:
The chromosome number will not be constant and the person would die.
Explanation:
During gamete formation, half of the chromosomes arise from one parent and the other half from the other parent. This is possible due to the process of meiosis.
If during gamete formation, the number of chromosome does not get reduced, then after fertilization the gamete will have double the number of chromosomes as compared to the parents. Hence, the chromosome number of the person will not remain constant and he/she would die.
The chromosome number will not be constant and the person would die.
Meiosis is the type of cell division that occurs during reproduction. In
this type of division, the result is the formation of two unique daughter
cells.
Mitosis on the other hand is the cell division concerned with growth and
replacement of worn out tissues in the body.
In instances where the gametes of a species had the same number of
chromosomes as the species' body cells, the species formed will have a
chromosome number which isn't constant which may result in death due to
issues occurring during replication.
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How can you tell that these snapdragon do not follow the pattern of complete dominance
Answer:
Thorough observation and understanding of dominance types
Explanation:
It is very simple to distinguish between traits following complete dominance or incomplete dominance
There can be three cases of dominance
a) Complete dominance - where characteristics of one allele are expressed over and above the characteristics of the other allele
b) Incomplete dominance - Here both the traits are dominant but a blending of the two traits occur for example red and white flower producing pink flower
c) Co-dominance - Here both the traits are dominant but no blending occurs between the two traits occur for example red and white flower producing flower with red and white bands
Based on the above definitions , pattern of complete dominance is followed or not in case of snapdragon can be depicted.
We can tell that snapdragons don't follow complete dominance due to the pink flowers of heterozygotes indicating an incomplete dominance pattern of inheritance, where neither red nor white alleles are completely dominant, resulting in an intermediate phenotype.
Explanation:You can tell that these snapdragons do not follow the pattern of complete dominance because of the presence of an intermediate phenotype in the heterozygote snapdragons. In cases of complete dominance, one allele is completely dominant over the other, and the heterozygote expresses the dominant phenotype. However, in incomplete dominance, the heterozygote expresses a phenotype that is a blend of the two parental phenotypes. For instance, when crossing a snapdragon with red flowers (CRCR) with one that has white flowers (CWCW), the offspring are not red or white but display pink flowers, which indicates a mix of both red and white traits.
This phenomenon contradicts the historical view that inheritance always results in dominant and recessive traits, as was first demonstrated by Gregor Mendel in his pea plant experiments. Incomplete dominance, like in the example of the snapdragon flowers, shows that one gene for flower color can have alleles for red and white, neither of which is completely dominant. Therefore, the resulting pink flowers of the heterozygotes (CRCW) clearly show the intermediate inheritance pattern.
Which of the following best describes how crossing over occurs during meiosis?
A. During prophase I, homologous chromosomes are lined up and pulled apart to opposite poles.
B. During prophase II, sister chromatids trade places with each other before
metaphase begins.
C. During prophase I, segments of chromatids are exchanged between homologous chromosomes.
D. During prophase II, chromosomes overlap and sections of each chromosome switch places.
Answer:
The correct option is C) During prophase I, segments of chromatids are exchanged between homologous chromosomes.
Explanation:
Meiosis can be described as a process of cell division which leads to genetic variations. These variations are produced due to crossing over and independent assortment of chromosomes. The number of chromosomes is reduced to half as the parent cells during this type of cell division.
Crossing over occurs between prophase I and metaphase I. During prophase I, segments of chromatids are known to be exchanged between the homologous chromosomes. Hence, option C is correct.
Answer:
B- homologous chromosomes join together to form tetrads during prophase I
Explanation:
Cells try to maintain three major conditions. One is your body temperature. What are the other two?
Cells try to maintain three major conditions which include temperature, pH level and solute concentration.
Organisms need to maintain steady conditions (i.e., a homeostasis state) inside their cells.The pH level is fundamental for carrying out many cellular processes (e.g., enzymatic degradation).Solute concentration is also fundamentally during many metabolic processes (e.g., transport of substances inside the cell).In conclusion, cells try to maintain three major conditions which include temperature, pH level and solute concentration.
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Which of the following is NOT an aquatic biome?
Answer:
Grassland
Explanation:
"Aquatic" means "relating to water"
Grasslands do receive rainfall, but not enough for it to be an aquatic biome.
From the given options, the one which is not an aquatic biome is: (2) grassland.
Grasslands are terrestrial biomes characterized by vast areas of grasses and few trees, with varying levels of rainfall and seasonal changes. These ecosystems are found on every continent except Antarctica and can vary in climate, vegetation, and animal life depending on their location.
An aquatic biome, also known as an aquatic ecosystem, refers to any environment that is predominantly water-based, encompassing both freshwater and marine habitats. These biomes can range from small bodies of water like ponds to vast oceans and include various types of aquatic ecosystems, such as lakes, rivers, estuaries, coral reefs, and the open ocean.
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The given question is incomplete, the complete question is:
Which of the following is NOT an aquatic biome?
freshwatergrasslandmarinenone of the abovesponse Question #1
Rosa eats a peanut bu
of protein, and bread is mo
afternoon. Rosa is breathing
nut butter sandwich for lunch. Peanut butter contains a lot
read is mostly starch. Rosa plans to go for a run later this
Rosa is breathing normally.
ne need from the food she ate and the air she breathes so that
her run? How do Rosa's body systems work together to get the
the needs into her cells? How do her cells use these molecules to
release energy for her body to run
What does she need from
she can go on her run? Howa
molecules she needs into her
Answer:
Sugar and other starch molecules get stored in the body in the form of glycogen. Glucose is the main energy source that is required by the body during exercise. Complex molecules, like starch and glycogen, need to be converted into glucose during exercise. So, having a carbohydrate-rich diet before exercise is necessary.
The glucose is then used for cellular respiration to generate ATP molecules. About, 36-38 molecules of ATP are generated by aerobic respiration.
Drag the tiles to the correct boxes to complete the pairs.
Match the phases in the cell cycle to the events that occur in each phase.
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The nucleus divides = mitosis
The cytoplasm divides = cytokinesis
The DNA replicates = interphase
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The nucleus divides = mitosis, The cytoplasm divides = cytokinesis and The DNA replicates = interphase.
What is Cell cycle?A cell's growth and division are accompanied by a sequence of processes known as a cell cycle. A cell spends the majority of its time in what is known as interphase, where it develops, duplicates its chromosomes, and gets ready to divide.
The cell then exits interphase, goes through mitosis, and finishes dividing. Each of the resultant cells, referred to as daughter cells, enters its own interphase to start a fresh cycle of the cell.
We refer to the procedure through which cells multiply and divide into two new cells as the cell cycle. G1, S, G2, and M are the phases of the cell cycle, respectively.
Therefore, The nucleus divides = mitosis, The cytoplasm divides = cytokinesis and The DNA replicates = interphase.
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Why is the pairing of nitrogen bases key to understanding how DNA replication occurs?
The DNA replication occurs by preparing a new strand of DNA that is based on the template strand only. So understanding the nitrogen base pairing is very essential for understanding DNA replication.
Explanation:DNA replication occurs prior to any type of cell division in all organisms. In case of humans, the DNA that is to be replicated needs to be de winded by means of decondensation of chromosomes into chromatin fibres and then to DNA fibres. Then there are enzymes like helicase and gyrase which helps in breaking the hydrogen bonds between two strands of DNA and to open it up for enzymes to get attached.
Then the enzyme DNA dependent DNA polymerase works on both the strands of DNA where it reads the mother DNA strand as a template and then brings deoxyribonucleotides complementary to the template strand and then polymerises it with the previous nucleotide to form a new DNA strand. Thus two DNA strands are produced which are again complementary to each other, leading to the production of a new daughter DNA. So, understanding the complementary base pairing is very essential to understand the DNA replication.
Chemical triggers and messengers for many
processes within cells that cause most of the
differences you can see among organisms are
called
Answer:
Proteins
Explanation:
Proteins are macromolecules composed of amino acids that perform multiple and varied functions in the body. Proteins that act as chemical messengers are present in the form of hormones, ligands, neurotransmitters, regulatory proteins and enzymes.
Genes code for proteins that in turn control all life processes. The differences we witness in individuals such as weight, height, skin color, intelligence etc are all due to our unique genetic code and a unique combination of proteins that these genes encode. Furthermore, the levels to which our genetic code is expressed is also regulated at the molecular level by proteins.
a testable explanation of a situation is called
Answer:
A hypothesis.
Explanation:
A hypothesis is a tentative answer to a scientific question. A testable hypothesis is a hypothesis that can be proved or disproved as a result of testing, data collection, or experience. Only testable hypotheses can be used to conceive and perform an experiment using the scientific method.
Lipids and proteins are both types of what? A. Carbohydrates
B. Elements
C. Macromolecules
D. Atoms
Answer:
C.
Explanation:
Lipids and proteins are both types of macromolecules. Macromolecules are molecules made up of more than one atom.
Answer:
The correct answer is C.
C. Macromolecules
Explanation:
Would you except to find a muscle tissue in a plant.Why or why not
Answer:
No, you would not expect to find a muscle tissue in a plant.
Explanation:
Why? because muscle tissues are built up of cells that receive and react to signals sent from the brain, though some plants (usually carnivorous or touch sensitive) do have different ways of movement. But again, these methods are *Not* muscle tissues!
Muscle tissue is not found in plants. Plants have different types of specialized tissues such as vascular and ground tissue.
Explanation:Would you expect to find a muscle tissue in a plant? Why or why notNo, you would not expect to find muscle tissue in a plant.
Plant cells are different from animal cells and do not have the specialized structures and proteins required for muscle movement.
Instead of muscle tissue, plants have different types of specialized tissues, such as vascular tissue for transporting water and nutrients, and ground tissue for storage and support.
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A stream table is a tool used to show how water causes erosion. Water from the left side of the table is added to model a stream. Suppose a block of wood is placed under the left edge of the table. Which characteristic of the stream is changed? gradient of the stream sediment in the stream velocity of the stream volume of the stream
Answer:
gradient of the stream
A stream table is a tool used to show how water causes erosion. Water from the left side of the table is added to model a stream is gradient of the stream.
What is the use of gradient?The gradient of any line or curve tells us the rate of change of one variable with respect to another.
Thus, gradient of the stream is the correct answer.
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A scientist is studying a volcano. She claims
that the lava that comes out of the volcano is a
liquid. She wants to make an argument to
support her claim. What question should she
ask to help her collect evidence for her
argument?
A. Does the lava have a definite volume?
B. Is the lava made of particles that move
around?
C. Does the lava have a definite volume and
does it flow freely?
D. Does the lava have a definite volume and
particles that are very far apart?
The question which the scientist should ask to help collect evidence for the argument is "Does the lava have a definite volume and does it flow freely?". Thus, the correct option is C.
What is Lava?When the magma flows or erupts onto Earth's surface, it is called as the lava. When lava erupts from the volcano it is made up of a slush of crystals, liquid, and bubbles. The liquid rocks and magma "freezes" to form volcanic glass. Chemically, this lava is made up of the elements like silicon, oxygen, aluminum, iron, magnesium, calcium, sodium, potassium, phosphorus, and titanium with some other elements in very small concentrations.
The lava can be claimed to be liquid by the argument which questions "Does the lava have a definite volume and does it flow freely" as liquids have a definite volume and flows freely in any container or space.
Therefore, the correct option is C.
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oxygen-carbon dioxide exchange, place the statements in correct order
This answer explains the process of gas exchange in the lungs, differentiates ventilation from gas exchange, and details the movement of oxygen and carbon dioxide during the exchange.
Gas Exchange Process in the Lungs:
Oxygen and carbon dioxide flow during gas exchange: In the lungs, oxygen moves from the alveoli into the capillaries while carbon dioxide moves from the capillaries into the alveoli.
Ventilation vs. Gas Exchange: Ventilation is the process of breathing, moving air in and out of the lungs, while gas exchange is the actual transfer of oxygen and carbon dioxide between the lungs and the blood.
Explanation of Gas Exchange: Gas exchange occurs in the alveoli where oxygen diffuses into the blood and binds to hemoglobin while carbon dioxide diffuses out of the blood into the alveoli to be exhaled.
Human __helps examine the impact of population growth on the
environment.
Answer:
]
Explanation:
"The impact of so many humans on the environment takes two major forms: consumption of resources such as land, food, water, air, fossil fuels and minerals. waste products as a result of consumption such as air and water pollutants, toxic materials and greenhouse gases."
Answer:
Geography
Explanation: