Answer:
Plant D
Explanation:
The control group is the plant that receives no treatment by the researchers, and is used as a "growth marker" for the others.
Answer:
Plant D does not listen to any music at all.
Explanation:
Control group is a group in the experiment which does not receive any treatment. It is kept as a benchmark for comparision with other variables.
Plant D does not listen to any music at all is the correct option. As it is not treated with the experimental variable that is music.
Throughout history, which of these is an ecological impact associated with agriculture?
Answer:
soil erosion is the answer
put the following in order from oldest to most recently evolved: gymnosperms,angiasperms, seedless vascular plants, algae, and nonvasculr plants
Algae, nonvascular plants, seedless vascular plants, gymnosperms, angiosperms
What could happen if a person doesn’t get the proper amount of protein in his or her diet?
Not consuming enough protein can cause muscle cramps, weakness, and soreness
The body would break down existing muscle to get the amino acids it needs.
A scientist took a boat trip across the Atlantic. On his voyage, he found a lizard, but was unsure of the species. He used his dichotomous key because he wanted to know where the lizard came from, so he could return it to that general area.
Answer:
D. for classifying organisms and studying biodiversity
Explanation:
A and C are irrelevant because there was only one organism to observe therefore the scientist could not observe how it interacted with others. B is irrelevant because the scientist did not have an ecosystem to observe.
A dichotomous key is an important scientific tool. Based on observable trait, it is used to identify different organisms. As the scientist used this tool to determine lizard, this implies that the purpose for classifying the organism and studying biodiversity, i.e., option D.
What is dichotomous key?Dichotomous keys consist of characters along with two choices in each step that helps scientists for proper and correct identification.
It can be complex or simple depending upon the organism.
As the scientist wants to identify the lizard this implies that the purpose for classifying the organism and studying biodiversity.
Thus, the correct option is D.
For more details regarding dichotomous key, visit:
https://brainly.com/question/2235448
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What are the limits to cell growth?
Answer:
so surface area is the limit
Explanation:
As a cell grows, its volume increases at a faster rate than its surface area. Therefore, the volume of a cell is limited by its surface area, which is directly related to its ability to permeate required materials through its membrane. Surface area limits the diffusion of nutrients into the cell.
The limits to cell growth include the Hayflick limit, which restricts the number of times cells can divide, and the inefficiency of diffusion over long distances, which imposes a size limitation. Additionally, overall growth is constrained by factors leading to saturation, where further increases may not promote or may even hinder growth.
Cells cannot grow indefinitely due to several critical factors. The Hayflick limit is a fundamental limit on the number of times cells can divide. This concept demonstrates that cells have a numerical limit to division, after which they can no longer proliferate. This limit is closely associated with the mechanical wear and tear analogy, where, just like mechanical devices, cells "wear out" over time through repeated cycles of division.
Regarding cell size, there are upper and lower size limits. The distance travelled by substances within the cell places an upper limit on cell size due to the inefficiency of diffusion over longer distances. This limitation means that large cells would be unable to efficiently transport nutrients and waste, leading to the necessity for cells to either remain small or change shape for better diffusion efficiency. Conversely, there is a lower limit to cell size determined by the need to house essential cellular machinery, such as DNA, ribosomes, and enzymes, within the cell.
When it comes to overall growth, factors such as nutrient availability, environmental conditions, and physical space impose limitations. These factors can encourage growth up to a point, known as saturation, beyond which growth either plateaus or declines due to toxicity or resource depletion. This phenomenon highlights the delicate balance organisms must maintain to support growth within the constraints of their environment.
Normal cardiac rhythm is determined by which of the following?
Sinoatrial node
Atrioventricular node
Mitral valve
Left ventricle
You can reduce the amount of pollutants in your home by _____.
You can reduce the amount of pollutants in your home by improving air circulation.
Answer: Reducing the waste and reusing the materials that can be used.
Explanation: The amount of pollutants can be reduced in house by reducing the amount of waste.
The materials that can be reused has to be reused so that the total waste can be less than the normal.
The materials can be recycled to be used again like a broken flower vase can be recycled into a show piece.
what is the Photic zone?
Answer:
The Photic Zone is the surface layer of the ocean that receives the sunlight.
Explanation:
explain how biochemical evidence, including dna, helps scientists to learn about early life on earth
Answer: Biochemical evidence such as fossil records, geological evidence, comparative anatomy, similar selective pressures, and molecular evidence all prove evolution and indicate the conditions in which early life resided on earth.
Explanation:
Fossil records- transitional forms of modern and ancient creatures imply the time periods of evolution and the environmental factors which forced those changes.
Geological evidence- (e.g. continental drift) can reveal the geographic conditions of ancient environments and the resulting interactions of different life forms.
Comparative anatomy- connects closely related species through similar physical structures.
Selective pressures- different organisms exhibited similar behavioral changes, indicating common ancient geological pressures.
Molecular evidence- organisms with related DNA prove ancient connections between species.
Biochemical evidence like fossils, anatomical comparisons between organisms, molecular tests, continental drift, similarity traits explain the evolution and early circumstances in which life started on the Earth.
The following are the evidences which helps scientists to learn about early life on Earth:
Fossil records are evidence that shows the difference between early life and present-day life on Earth.Continental drift tells about the geological condition and the distribution of life on the different regions of the Earth.Anatomical comparison among closely related organisms through studying physical attributes gives evidence about ancestors.The molecular test gives a relation between closely related species with the help of DNA examinations.
Therefore, biochemical evidence help researchers in learning about the early life on the Earth.
To know more about evolution follow the given link:
https://brainly.com/question/19431143
How are messages carried throughout the human body from the brain to the nervous system?
A. Active transport B. Chemical channels C. Electrical signals D. Magnetic synapses
Answer:
C)
Explanation:
Your nervous system contains millions of nerve cells (Neurons), which are specialised to transmit messages from one part of your body to another one. The neurons carry messages in the form of electrical signals called nerve impulses.
For that reason, the correct response is letter C)
Answer:
The correct answer is – electrical signal. The messages in our body that need to be sent from the brain to the different parts of the nervous system are carried by the electrical signals.
Explanation:
The signal or messages transfer in our body according to the voltage gradient created by the different ions present inside and outside of the cell. The sensory organs receive the messages through the sensory nerve to the central nervous system. The motor nerve transfers this message to the effector organ by creating the electrical gradient.
Further explanation:
The nerve impulse is the form of the electrical signal caused by the changes in the voltage inside and outside of the axons.
The speed of the nerve impulse is fast and can go up to the speed of 250mph. The conduction speed can be increased by increasing the diameter of the axon and increasing the temperature.
The important ions that are involved in changing the electrical gradient of the cell is sodium, potassium, calcium and chlorine.
During the transmission of nerve impulse, the cell changes from its resting membrane potential to the depolarization of the cell . The sodium ions enter in the cell for the depolarization of the cell. The potassium ions are responsible for maintaining resting membrane potential of around -50 to + 70 mV depending on the type of the cell. Hence, the change in the electrical potential of the cell helps in the transmission of the nerve impulse from the brain to the nervous system.
Learn more:
1. Nerve impulse https://brainly.com/question/11882843 ( answer by AL2006 Ace).
2. Electrical impulse https://brainly.in/question/2260933 ( answer by Chetnachaudhary).
Keywords
Electrical impulse, nerve impulse, electric potential, ions, potential, permeability and central nervous system.
The cells that make up plant leaves are specialized in structure and function to allow them to produce food from sunlight in the process known as photosynthesis. Which statement below BEST summarizes why plant leaves are specialized structures that are generally flat and thin? A) to allow the transportation of nutrient materials into the roots B) to create the large surface area needed to dissipate heat energy C) to maximize the amount of light transmission through the cell layers D) to maximize the ability of the leaf to conserve water needed for photosynthesis
Answer:
C.
Explanation:
What is the movement of air from high pressure areas low-pressure areas
Answer:
Wind
Explanation:
Wind refers to a mass of moving air. Air has pressure. Air always moves from the region of higher pressure to that of lower pressure. The intensity of the pressure gradient determines the speed of the air movement. A higher pressure gradient imparts higher speed to the air movement. Hence, movement of air from high pressure areas low-pressure areas is called wind.
"The movement of air from high pressure areas to low-pressure areas is known as wind.
Wind is the flow of gases on a large scale. On the surface of the Earth, wind consists of the bulk movement of air. In outer space, solar wind is the movement of gases or charged particles from the Sun through space, while planetary wind is the movement of gases within the atmospheres of planets.
The primary cause of wind is the uneven heating of the Earth's surface by the sun. Since the Earth's surface is made up of different types of land and water, it absorbs the sun's radiation unevenly. During the day, the air above the land heats up more quickly than the air above water. The warm air over land expands and rises, and the cooler air over water rushes in to take its place, creating wind. At night, the winds are reversed because the air cools more rapidly over land than over water.
In addition to the temperature differences, the rotation of the Earth also affects the direction and strength of the wind. This is known as the Coriolis effect. The Coriolis effect causes winds in the Northern Hemisphere to veer to the right and winds in the Southern Hemisphere to veer to the left.
The pressure differences that cause wind are also influenced by geographical features such as mountains and valleys. Wind can be classified into several types based on its spatial scale, its speed, the types of forces that cause it, the regions in which it occurs, and its effect. Some of the common types of winds include global winds, trade winds, westerlies, and local winds such as sea breezes and land breezes.
In summary, wind is the movement of air from areas of high pressure to areas of low pressure, driven by temperature differences, the Earth's rotation, and geographical features. This movement plays a crucial role in weather patterns and the redistribution of heat around the globe."
1. The organized set of procedures used to solve a problem or answer a question is called the scientific ________. method experiment 2. How many variables are tested in any controlled experiment? one two three 3. _______ is measured on a balance in grams.
Answer:
1. scientific method
2. two
3. independent variable
What is the ultimate source of energy for plants
Sunlight because all plants need sunlight to produce food
Can you please help.....?????!!!!!!!!
Answer:
use of fossil fuels..........
because we use it as petrol and C.N.G and diesel
Which was NOT discovered by Galileo
The two moons of Mars.Answer:B
Answer:
I believe it is B
Explanation:
what are the rules of atoms?
The rules of the atoms can be majorly explained through three rules and principles;
Aufbau principlePauli exclusion principleHund's ruleHund’s rule states that an atomic orbital is firstly singly occupied by electrons before it is doubly occupied until its fully filled. Electrons in a singly occupied orbital have the same spin quantum number.
Aufbau principle states that the lowest atomic orbitals are occupied first, while Pauli exclusion principle states that the electrons in an atomic orbital cannot have the same quantum state.
Mammals reproduce through a process called sexual reproduction. During this process, which involves two A.
a female egg cell and a male sperm cell each develop separately into an offspring that is different from both parents.
B.
a female egg cell combines with a male sperm cell to make an offspring that is identical to one of the parents.
C.
a female egg cell and a male sperm cell each develop separately into an offspring that is identical to its parent.
D.
a female egg cell combines with a male sperm cell to make an offspring that is different from both parents.
parents
With sexual reproduction a sperm coming from the male must unite with the female egg. Both are needed for this kind of reproduction, and an offspring CAN'T be formed without both. Unlike asexual reproduction, the offspring of a mammal reproducing sexually is DIFFERENT from both parents, since the offspring is a combination of both the mother and the father.
An easy to remember example I use when thinking about what sexual reproduction is:
the formation of a human child. A mother with her egg and the father with the sperm is BOTH needed. If you think about siblings that come from the same parents (and therefore same gene pool) they are not all exactly identical to each other. Although they may have similar features, they look different and are NOT genetically identical
Therefor for your question the answer is D.
Hope this helped!
Answer:
D. a female egg cell combines with a male sperm cell to make an offspring that is different from both parents
Explanation:
What is the function of the excretory system? :)
A: transport nutrients
B:break down food
C: remove waste
D: respiration
Hi!
It would be C, remove waste.
Hope this helps!
I'm pretty sure it's c.
(06.01 MC) Which type of biotechnology would a dairy farmer use to mate the cows at his farm with genetically superior bulls to produce offspring that give high-quality milk? (4 points) Genetic engineering because the genes of the cows are altered Genetic engineering because cows with desirable traits are produced Artificial selection because offspring with desirable traits are produced Artificial selection because the process reduces the production time of offspring
Answer:
Artificial selection because offspring with desirable traits are produced
Explanation:
Farmers would not alter the genes of the cows through genetic engineering. A more practical approach is using artificial selection where two individuals with desirable traits are bred to produce offspring with those desirable traits.
Answer:
c
Explanation:
HELP PLEASE ASAP WILL GIVE BRAINLEIST
What captures energy from sunlight during photosynthesis?
a.
solar cells
b.
stomata
c.
chlorophyll and other pigments
d.
carbohydrates
i think its c. chlorophyll and other pigments correct me if i'm wrong! <3
Answer:
I'm pretty sure it's C.
Explanation:
Chlorophyl captures light energy and uses it to power the second stage of photosynthesis.
How can a change that occurs downstream in a river ecosystem (that is, a dam) affect the rest of that ecosystem?
The dams are very useful for the people and their needs, but they also very often cause problems in the ecosystems in the rivers on which they are built on. For starters, the dams limit the movement of the species, as well as the movement of the nutrients, and considering the fact that this effects the lifestyle of certain species, as well as changing the nutritional quality of the water, it heavily affects the ecosystem. The water upward from the dam is accumulated, and because its movement is largely stopped, the water is more stagnant. The more stagnant water is getting warmer much more easily, so the temperature change of it results in change in the habitat of the species, often resulting in destabilizing the ecosystem, with some species dying out, while others exploding in numbers.
What is the function of cartilage in adult bones?
allowing flexibility in joints
preventing friction between bones
connecting bones to bones
storing calcium and phosphorus
Answer:
preventing friction between bones
The correct answer is B. Preventing friction between bones
Explanation:
Cartilage is a soft, and elastic tissue that protects the end of bones in articulations; although this tissue also forms structures such as the ear. In the case of cartilage in bones, the main function of this is to act as a protector for the bones by reducing the friction between them. For example, cartilage is found in the joints. This is necessary because bones are hard structures and direct friction between them would lead to deterioration of the bones. According to this, the main function of cartilage is preventing friction between bones.
Plants cannot make sugar molecules for energy without _______.
I. water
II. sunlight
III. carbon dioxide
A.
II and III only
B.
I, II, and III
C.
I and III only
D.
I and II only
Answer:
water and carbon dioxide
Explanation:
water molecules and carbon dioxide molecules are combined to produce sugar molecules also known as glucose
Answer:
IT'S B THE ANSWER
Explanation:
plants need all 3 property's
I did it on study island and got it right.
The importers and the Los Angeles residents would likely agree that A) the return of the smog is linked to the burning of fossil fuels. B) the rise in number of both incoming and outgoing airplanes and ships. C) hot summers, which lead to increased use of air conditioning, is the root of the problem. D) increased use farm equipment, power generators, and train engines are responsible for the return of the smog.
Answer:
The answer is A. The return of the smog is linked to the burning of fossil fuels.
Explanation:
Smog is a condition of air pollution where the smoke is mixed with the Fog. The main reason for increasing smog is burning of fossil fuel like coal and petroleum. Smog is clearly visible and contain toxic compounds like sulfur oxide and nitrogen oxide and other particles. Smog not only cause problem for vision it also cause serious respiratory problems like asthma.
A trait has two alleles, represented by p and q. If p = 0.89, what is q?
The answer is 0.11. I just did the quiz on Apex.
Final answer:
To find the frequency of allele q when p is 0.89, we subtract p from 1, resulting in q = 0.11, in accordance with the Hardy-Weinberg principle that states p + q = 1.
Explanation:
If the trait in question has two alleles, represented by p and q, and p is given as 0.89, we can find q by using the Hardy-Weinberg principle, which states that p + q = 1 for a population in genetic equilibrium. Since we know the value of p, we can subtract it from 1 to get the value of q.
q = 1 - p = 1 - 0.89 = 0.11.
So, the frequency of allele q is 0.11.
Compare and contrast viruses and bacteria.
Answer:
Viruses and Bacteria
Explanation:
Bacteria are single-celled, prokaryotic microorganisms that exist in abundance in both living hosts and in all areas of the planet. By their nature, they can be either "good" or "bad" for the health of plants, humans, and other animals that come into contact with them. A virus is acellular (has no cell structure) and requires a living host to survive; it causes illness in its host, which causes an immune response. Bacteria are alive, while scientists are not yet sure if viruses are living or nonliving; in general, they are considered to be nonliving.
Infections caused by harmful bacteria can almost always be cured with antibiotics. While some viruses can be vaccinated against, most, such as HIV and the viruses which cause the common cold, are incurable, even if their symptoms can be treated, meaning the living host must have a strong enough immune system to survive the infection.
Viruses, much smaller than bacteria, rely on host cells to reproduce and share few characteristics with living organisms. They are simpler than bacteria, which are capable of independent reproduction and metabolic activities. The relationship between viruses and their hosts is critical to viral lifecycle strategies.
Explanation:Viruses are much smaller than bacteria; most viruses range from 5 to 300 nanometers, whereas bacteria typically measure between 1,000 to 2,000 millimicrons. This difference in size is because viruses have a simpler structure, consisting mainly of a nucleic acid core and a protein coat, while bacteria are complex, cellular organisms with a full suite of cellular machinery. As a result, viruses can only reproduce by infecting a host cell, contrasting with bacteria that can reproduce on their own. In terms of their biology, only certain characteristics of life are evident in viruses, as they exhibit parasitic replication and genetic variation, but they do not fit the conventional definition of life since they cannot carry out metabolic processes independently.
Viral vs. Bacterial Reproduction
The modes of reproduction for viruses and bacteria differ significantly. Viruses rely on a host's cellular machinery to replicate, injecting their genetic material into the cell and commandeering it to produce new viruses. Bacteria, in contrast, often reproduce independently through binary fission, a process in which a single cell divides into two identical daughter cells.
Living Characteristics and Viral Dependency
While viruses share some characteristics with living organisms, such as the ability to evolve, they are not considered alive because they do not have the cellular structure necessary to carry out metabolism without a host. A virus depends on a host cell for virtually all its life processes. For instance, the influenza virus maintains the viability of its host cell to ensure the successful production and release of new viral particles.
The Nature of Viruses
A virus, such as a phage, is an acellular entity that typically comprises two main components: genetic material and a protective protein coat. By acting only within living cells, viruses exhibit a level of opportunistic survival strategy, highlighting the intricate relationships they maintain with their biological host environments.
What part of the cell does the electron transport chain take place?
A. Golgi apparatus B. Mitochondria C. Nucleolus D. Endoplasmic reticulum
Answer: Mitochondria.
Explanation: The electron transport chains is a process that is used for extracting energy by oxidation of NADH and FADH molecules produced during Glycolysis and Kreb's Cycle.
Energy released during ETC is used for the formation of ATP molecules.The ETC takes place in the inner mitochondrial membrane in Eukaryotes.
Answer:
Mitochondria
Explanation:
The electron transport chains is a process that is used for extracting energy by oxidation of NADH and FADH molecules produced during Glycolysis and Kreb's Cycle.
Energy released during ETC is used for the formation of ATP molecules.The ETC takes place in the inner mitochondrial membrane in Eukaryotes.
Where is frost wedging most likely to occur?
Answer:
rost wedging is a form of physical weathering that involves the physical breaking of a rock. It typically occurs in areas with extremely cold conditions with sufficient rainfall. The repeated freezing and thawing of water found in the cracks of rocks (called joints) pushes the rock to the breaking point.
Explanation:
The frost wedging occurs in extreme cold climates and in areas of extensive rainfall.
Explanation:
Frost wedging is a concept that occurs due to the expansion of water to ice, water is a liquid matter thereby the molecules in it are loosely filled whereas it expands when it becomes ice as the molecules compact each other to a solid matter. This causes cracks in the areas this water is filled for instance the cracks in the rocks or pipe hedges etc.
In the P generation a tall plant was crossed with a short plant l. Short plants reappeared in the F2 generation because?
Final answer:
Short plants reappeared in the F2 generation because they inherited two recessive alleles for shortness after the F1 generation plants self-pollinated and segregated alleles during gamete formation.
Explanation:
Short plants reappeared in the F2 generation of Mendel's experiments because the trait for shortness, although hidden in the F1 generation, is a recessive trait that can manifest when two recessive alleles are present.
In Mendel's first experiment, a tall plant (dominant trait) was crossed with a short plant (recessive trait), resulting in F1 offspring that were all tall because they had one tall allele and one short allele (Tt), with the tall trait being dominant.
When the F1 generation plants self-pollinated, some of their offspring (F2 generation) received two short alleles (tt). According to Mendel's law of segregation, these F2 offspring exhibited the short phenotype because they lacked the dominant tall allele.