Your body is composed of microscopic cells that are visible all the time ?True or false
Answer:Our body is composed of many microscopic cells. They are visible as a whole, but not individually. And all cells are not visible from outside. So the given statement is false.
Explanation:Cells are defined as structural and functional unit of a living organism. Cells are of various shapes and sizes. A squamous epithelium cell is flat whereas a neuron is upto 1 meter in length. Cells of bronchus have projections called cilia whereas cells of small intestine have microvilli on their surface.
Our skin is formed of epithelial cells which are seen as a whole with our naked eyes. But individual structures of them are very small. This is why, human cells are microscopic in structure and not individually seen with naked eyes.
Give one example of a characteristic that is unique to sedimentary rocks
Answer:
a unique sedimetary rock will not crumble
Explanation:
Answer:
Sedimentary rocks have; stratification, ripple marks, cross beds, mud cracks and fossils.
Explanation:
Which increases genetic variation?
A. Natural selection
B. Genetic drift
C. Stabilizing selection
D. Mutations
Answer:
D
Explanation:
It is D because they can reorganize the chromosomes.
Mutations increase genetic variation due to changes in DNA. Therefore, option D is correct.
What are mutations?Mutations are changes in the DNA sequence that can occur spontaneously or due to exposure to environmental factors such as radiation, chemicals, or viruses. Mutations can affect a single nucleotide (a change in a single base pair), a small segment of DNA, or a larger portion of a chromosome.
Mutations can occur during DNA replication, meiosis, or exposure to mutagens. They can be beneficial, harmful, or neutral to an organism's survival and reproduction.
Some mutations can result in new genetic variations that provide an advantage in a certain environment. Other mutations can cause genetic disorders or increase the risk of certain diseases. Therefore, option D is correct.
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All organisms start as one unique cell. True or False
Answer:
True
Explanation:
We all begin existence as the simplest thing you can imagine if you're trying to picture life: a single cell--nothing, in other words, but a tiny, spherical bag of proteins. In fact, the average one-celled amoeba looks far perkier under a microscope than a fertilized human egg
Which of the following types of reproduction is most likely to result in a rapid growth in population?
A.
neither asexual reproduction nor sexual reproduction
B.
asexual reproduction or sexual reproduction
C.
asexual reproduction
D.
sexual reproductionWhich of the following types of reproduction is most likely to result in a rapid growth in population?
A.
neither asexual reproduction nor sexual reproduction
B.
asexual reproduction or sexual reproduction
C.
asexual reproduction
D.
sexual reproduction
Final answer:
Asexual reproduction is most likely to result in a rapid growth in population.
Explanation:
The type of reproduction that is most likely to result in a rapid growth in population is asexual reproduction. Asexual reproduction involves the production of offspring without the need for a mate, and it can occur through various methods such as binary fission, budding, or fragmentation. Since asexual reproduction does not require the time and energy needed to find a mate, it can lead to a rapid increase in population size under favorable conditions. For example, bacteria can reproduce through binary fission, where a single cell divides into two identical cells. Each of these cells can then divide again, resulting in exponential population growth.
What symptoms do deer with CWD have?
Answer:
Explanation:
Symptoms of infected animals include emaciation, excessive salivation, lack of muscle coordination, difficulty in swallowing, excessive thirst, and excessive urination. Subtle behavioral changes like loss of fear of humans or other abnormal behavior are often the first signs noticed.
Chronic Wasting Disease (CWD) in deer has symptoms such as weight loss, excessive salivation, drooping ears, lack of coordination, and behavioral changes.
Explanation:Chronic Wasting Disease (CWD) is a disease that affects deer and elk. The symptoms of CWD include weight loss, excessive salivation, drooping ears, lack of coordination, and behavioral changes such as decreased interactions with other animals. Infected deer may also have a blank or staring expression and may stand in water for long periods of time.
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Examine the soil profile and use the drop-down menu
to select what each label identifies
Label o~
Label A~
Label B~
Label C~
Answer:
Answer: label O: organic material
Label A: topsoil
Label B: subsoil
Label C: weathered rock
Explanation:
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Why is taxonomy important?
Answer:
Taxonomy is the branch of science concerned with classification (like organisms)
Explanation:
Classification is a HUGE part of science..
What is science without classification because classification is like evidence..
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1. Igloos are buildings that are made of packed
snow. Which statement describes the particles
that make up the igloo?
(A) The particles in the snow have no kinetic
energy
(B) The particles in the snow are not attracted to
one another.
(C) The particles in the snow have some kinetic
energy, but the particles only move around in
place.
(D) The particles in the snow melt easily because
they have more kinetic energy than liquid
water.
The particles of the snow have kinetic energy, but being a solid, it has less kinetic energy than that of liquid water. So they move around in a place about its mean position.
Option C
Explanation:Igloos are the small homes made up of snow. It used to be homes for the people living in Arctic regions in past. Now some tribes still live in these igloos, or they are made by tourists for amusements.
Snow is basically precipitation of ice from clouds. Being the solid form of water, ice has molecules more compactly arranged in its crystal structure. Thus, the molecules cannot move here and there like in fluid. But having some kinetic energy, they have certain movements i.e vibrations around its mean position.
explain why controlling the proteins in an organism controls the organisms characteristics
Answer:
Controlling the proteins in an organism controls the organism's characteristics because proteins are enzymes, and enzymes catalyze and regulate chemical reactions, and therefore can control certain traits such as color, shape, or even gender.
Explanation:
Controlling the proteins in an organism regulates the organism's characteristics because translation regulates the protein expression of cells based on DNA sequences and eventually the characters are expressed.
What is the importance of protein expression?In general, the cell has genetic contents that are expressed in terms of transcription and translation, and here these are called the fundamental processes of the cell as they are required by the cells for enzyme formation, synthesis of the receptors, membrane protein, and expression of the traits. If the translation is regulated, then the message present in the DNA is also regulated, and the protein expression can be controlled.
As a result, controlling the proteins in an organism regulates the organism's characteristics because translation regulates the protein expression of cells based on DNA sequences and eventually the characters are expressed.
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Life changes that limit one's ability to make independent choices or improve the self tend to cause stress most
for individuals in________
cultures
A. collectivistic
B. urban
C. individualistic
D. indigenous
Answer: Individualistic
Explanation:
The individualistic culture is featured by individualism in which the priority is on the individual as compared to that of the group.
Individualistic culture revolves around the self and being independent instead of being identified with a group mentality.
The self development causes stress on the other individuals because there is no such development of the group.
Heat released as the reaction occurs e. Heat stored within product molecules
b Heat stered within reactant molecules & Heat added to initiate a reaction.
7. A shadent set up four test tubes containing starch solution. Supplies included amylase lanc e de dagen
starch in humans), and an incubator. In which tube listed would starch digestion proceed most quickly
a Tube 1: No amylase, room temperature (250)
Tube 4: Amylase present, body temperature (370)
Tube 3. Amylase present, room temperature (
20)
d. Tube 2: No amylase, body temperature (370)
If we want to see the surface of a bacterium as closely as possible, which type of meroncope would be be
scanning electron microscope
e tunneling microscope
compound light microscope
d. transmission dectron microscope
9. Capillary action is the result of adhesion Which aspect of water responsible for this?
* nonpolar covalent bonds that enable water to dissolve other substances
hydrogen bonds between water and another substance
polar covalent bonds that join molecules or was to other wubstances
d otic bonds that enable electrons to flow through water and into another substance
0. Amine acids are the building blocks of which macromolecule?
protein
ONA
carbohydrate
answer to question 7 - Tube 4: Amylase present, body temperature (37ºC)
answer to question 9 - Hydrogen bonds between water and another substance
What effort do enzymes have on the activation energy of exergonic and endergonic reactions
Activation Energy Of Exergonic Reactions:
A. increase
B. Decrease
C. Increase
D. Decrease
Activation Energy Of Endergonic Reactions:
A. Increase
B. Decrease
C. Decrease
D. Increase
Answer:
Enzymes 'reduces the activation energy' of both Exergonic and Endergonic Reaction by acting as a catalyst.
Explanation:
For example, in the case of 'carbonic anhydrase', enzymes act rapidly causing the chemicals to 'react 107 times faster' than they would normally. Enzymes are substrate specific meaning an enzyme working on one substance may not work on another. Function of the enzyme is identified by its 'shape of the protein' and arrangement of these molecules produces an area called activation site.Enzymes lower the activation energy of both exergonic and endergonic reactions.
Explanation:In biological systems, enzymes play a crucial role in lowering the activation energy of chemical reactions. Activation energy is the energy required to start a reaction. Enzymes facilitate reactions by providing an alternative pathway with a lower activation energy, allowing the reaction to occur more easily and at a faster rate. For exergonic reactions, which release energy, enzymes can help decrease the activation energy. For endergonic reactions, which require energy input, enzymes can still lower the activation energy required for the reaction to proceed.
in addition to exposure to germs or pathogens, what other factors influence your risk of getting an infectious disease
Answer:
Risk factors for infectious diseases:
Having a weak or compromised immune systemTaking medications such as steroids or immuno-suppressantsHaving HIV or AIDSNot being vaccinated against an infectious diseaseHaving cancer or a disorder that weakens the immune systemBeing malnourishedExplanation:
Apart from exposure to germs, certain other factors increase the risk of contracting an infectious disease.
Compromised or Suppressed Immune system:
A compromised or suppressed immune system means that your immune system cannot effectively fight against pathogens. The immune system can either be weak naturally, due to malnourishment, undernourishment or be compromised by certain disorders or medication.Immunosuppressants are drugs that suppress or inactivate the immune system. These are prescribed to patients with auto-immune disorders (a disorder in which the body's own immune system starts attacking the body's own cells and organs).HIV/AIDS
Since HIV attacks an important component, the T-helper cells of the immune system, HIV positive or AIDS individuals have a weak immune system that lowers their ability to fight diseases.Not Vaccinated:
Vaccination increases a body's capability to fight deadly infections. Un-vaccinated individuals are at a higher risk of contacting diseases.
which level of classification contains the largest number of organisms
Answer:
Kingdom, sorry if its wrong! I hope this helped!
In a certain species of plant, the color purple (P) is dominant to the color white (p).
According to the Punnett Square, what is the probability of an offspring being
white?
a. 0%
b. 25%
C. 50%
d. 75%
e. 100%
The probability of an offspring being white in the given scenario, assuming heterozygous parents, is 25%, as calculated using a Punnett square.
Explanation:The probability of an offspring being white in the given plant species, where purple (P) is dominant over white (p), can be determined by creating a Punnett square. If we assume both parents are heterozygous (Bb), the Punnett square would have one quarter (bb) representing white flowers. Therefore, there is a 25% chance that an offspring will have white flowers (rr). The other three quarters would result in purple flowers because of the dominant purple allele (P), showing a 3:1 ratio of purple to white.
what organic molecules are in chicken
Answer:
Organic molecules present in chicken are Nucleic acid, proteins, carbohydrate and lipids .
Explanation:
Chicken itself has the all four organic molecules in it. Organic molecules are those having carbon in it. They are attached by covalent bonds, in which electrons are being shared within the atoms. The nucleic acids are DNA and RNA which helps in the making of the proteins which are found in the various structure and ought to perform various metabolic functions. Proteins are the building block of the amino acids. Lipids found are the fat bodies, burning of lipids gives us energy.
Chicken contains organic molecules such as proteins, lipids, carbohydrates, and nucleic acids, which are essential for various biological functions and nutritional needs. The nutritional value of chicken can vary depending on farming practices, which can alter the balance of these nutrients, like omega-3 fatty acids.
Explanation:The organic molecules found in chicken include a variety of biomolecules essential for life. Some of the primary categories of these organic molecules are proteins, lipids, carbohydrates, and nucleic acids. Proteins in chicken not only serve as a major source of dietary amino acids for building and repairing tissues but also play roles in various biological functions like enzyme and hormone activities.
Chickens are also a source of lipids, which include fats that are important for energy storage and hormonal functions. Carbohydrates present in chicken are generally found in small quantities and include glycogen, which is a stored form of glucose. Nucleic acids, like DNA and RNA, are present in every cell and are responsible for genetic information and protein synthesis.
Furthermore, chickens produce glycosylated proteins, adding the correct sugars to these proteins. Modern farming practices have influenced the nutritional composition of chicken, altering levels of essential nutrients like omega-3 fatty acid. It has been observed that intensively raised chickens now have higher fat content compared to their protein content, with reduced amounts of omega-3 fatty acids compared to chickens raised in the past.
Pesticide use in other countries
still represents a danger to us in
Canada. Why?
Answer:
I think it may be because of the possibility of the pesticides traveling to Canada by food and crops so it good still harm people there.
A commuter airplane must make two stops before reaching its final destination. From its origin, the plan flies 300 miles west to reach its first destination, and 400 miles north to reach its second destination. Finally, it flies 700 miles east to reach its final destination. What is the straight-line distance between its origin and its final destination?
565. 685 miles
Explanation:
The description of the vector of the plane travel forms a trapezoid shape as shown in the attached diagram. The requested vector distance is the hypotenuse of the right-angled triangle on the right. We understand that to get hypotenuse we use the formula;
a² + b² = c²
400² + 400² = c²
c² = 320,000
c = 565. 685
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6. Read the statement from a scientific researcher. Many organisms depend on other organisms to live,
such as bacteria that live inside cells, and fungi that form parasitic relationships. These organisms are
reliant on their hosts to complete their life cycles. Viruses also rely on host cells in a similar manner.
Which argument about viruses is supported by the researcher's statement?
(a) Viruses create new host cells.
(b) Viruses respond to their environments.
(c) Viruses are nonliving.
(d) Viruses are living.
the argument that the researcher supports in this statement is that the Viruses are nonliving
Answer : Option C
Explanation:
Viruses are organic structures and they are often termed as "organisms at the end of life". Virus is not considered a living as it does not have a biological machinery to replicate.It is a parasite and it needs a host to replicate.
The virus tries its entry through the wounds, respiratory tracts and by passing through insects.
The complete virus particle is known as virion which consists of a nucleic acid surrounded by a capsid, Virus first attach themselves to a host through their surface.
Discuss the law of segregation and explain why each organism has two copies of gene for each trait expressed
Answer:
The explanation is provided in the explanation section
Explanation:
Gregor Mendel, who was referred to as the FATHER OF GENETICS discovered the principles that governs heredity in his several experiments. He observed that, for a particular trait, an organism receives two copies of a gene called ALLELE. This two copies are contributed by each parent in gametes during reproduction. An allele is a contrasting form of a gene, that is responsible for a particular trait of that gene.
For example, the height gene possesses two alleles T and t, which is responsible for a tall and short trait respectively. In an organism, two copies od this height gene will be present either same or different depending on which allele is contributed by each parent. This explains why a diploid organism possesses two alleles for a specific gene.
One of the principles of heredity discovered by Mendel is the LAW OF SEGREGATION, which states that the alleles of a gene will separate into gamete during gamete formation (meiosis). Mendel stated that only one form of a gene (allele) will be found in each gamete. For example, in an organism with Tt genotype, the gametes produced by this organism will either contain T or t allele.
The Law of Segregation states that genetic traits are split during gamete formation, producing offspring with two copies of each gene, one from each parent. This is due to the fact that most organisms are diploid, having two sets of chromosomes from both parents.
Explanation:The Law of Segregation, also known as Mendel's first law, states that during the formation of reproductive cells (eggs and sperm), pairs of genetic traits are separated or segregated from each other. This means each parent contributes one copy of the gene for each trait, resulting in the offspring having two copies of the gene - one from each parent. These copies then randomly assort into gametes, maintaining genetic variation.
As to why each organism has two copies of a gene, this is attributed to the fact that organisms are diploid. A diploid organism has two sets of chromosomes, one set from the mother and one from the father, and consequently, two copies of each gene. These genes often have slight variations, leading to diversity in traits like eye color, skin color, and so on.
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If a organism has a diploid number of 44, how many
chromosomes does it have? *
Answer:
46
Explanation:
Why does a cell need to make RNA
Answer:
When the cell needs to produce a certain protein, it activates the protein's gene–the portion of DNA that codes for that protein–and produces multiple copies of that piece of DNA in the form of messenger RNA, or mRNA. ... We now know that RNA can also act as enzymes (called ribozymes) to speed chemical reactions.
Explanation:
When the cell needs to produce a certain protein, it activates the protein's gene–the portion of DNA that codes for that protein–and produces multiple copies of that piece of DNA in the form of messenger RNA, or mRNA. ... We now know that RNA can also act as enzymes (called ribozymes) to speed chemical reactions.
Which memory failure suggests that our memories may fade somewhat over time?
Bias
Absent-mindedness
Transience
Persistence
Answer: Transience
Explanation:
Transience refers to the general degradation of a specific memory over a period of time. The events that can be remembered are the recent events than those of the events that has occurred in the past.
This is true when it comes to episodic memory. This happens because every time the memory is re-encoded in the hippo campus.
Transience is caused because of the interference in the brain. One that does not allows the brain to retain the older information over new ones known as retroactive interference and the other is proactive interference where the older information does not allows the new information to be retained by the brain.
Answer:
Transience
Explanation:
I took the test and if you look in 02.05 it says it
What does the sequence of nucleotides in DNA code for?
Which scientist developed a theory that describes how light interacts with gravity?
A. Albert Einstein
B. Edwin Hubble
C. Georges Lemaitre
D. James Clerk Maxwell
Answer:
Albert Einstein
Explanation:
Albert Einstein developed a theory that describes how light interacts with gravity.
Answer: Albert Einstein
Explanation:
Why is a dichotomous key called a dichotomous key?
Answer:
The name comes from the Greek “di” for “two” and “tome” for “cutting instrument.” As the name suggests, a dichotomous key arrives at the answer to species identification by presenting a series of questions with two possible answers.
Explanation:
You will understand better with the picture.
A dichotomous key is called so because it presents a series of two opposite choices (dichotomies) at each step to classify and identify organisms.
A dichotomous key is a systematic tool used by biologists and taxonomists to identify and classify organisms based on their observable characteristics. It is designed as a series of paired statements or questions, where each pair represents two opposite characteristics of the organisms being studied. The user must choose the statement that best matches the observed characteristics of the specimen they are trying to identify.
At each step of the key, the user makes a choice between the two options, leading them to the next set of characteristics that narrows down the possibilities. This process continues until the user reaches a specific name or classification for the organism.
The term "dichotomous" comes from the Greek word "dichotomia," which means division into two parts. The key's structure of presenting two opposing choices at each step helps to simplify the identification process and efficiently categorize organisms into specific groups based on their shared characteristics.
Dichotomous keys are widely used in various scientific fields, including biology, botany, zoology, and ecology, to identify and classify organisms in a structured and organized manner. They are valuable tools for researchers, students, and anyone involved in the study of living organisms.
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PLZ HELP ASAP!!!! I WILL GIVE BRAINLIEST!!!
Answer it would be the bird
what are the masses (in kilograms) of the three objects in the Gizmo? potential shelves gizmo answer
The masses of the objects on the Gizmo for 14 N object is 1.42 kg, 80 N object is 8.16 kg and 98 N object is 10 Kg
How do we explain?mass, in physics, is described as the quantitative measure of inertia, a fundamental property of all matter.
The masses of the objects on the Gizmo can be calculate as follows:
W= m x g
where w=
the weight,
m is the mass and
g is acceleration of gravitation
W= m x g
14N = m x 9.8
m = 14/ 9.8
m = 1.42 kg
for the 80N Object
W= m x g
80N = m x 9.8
m = 80/ 9.8
mass = 8.16 kg
for the 98N Object
W= m x g
98N = m x 9.8
mass = 98/ 9.8
mass = 10 kg
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complete question:
An object’s weight is determined by its mass (m) and the acceleration due to gravity (g) affecting that object: w = mg. On Earth, g = 9.8 m/s 2 .
What are the masses (in kilograms) of the three objects on the Gizmo? (Note: 1 N = 1 kg m/s ²). 14 N object,80 N object,98 N object.
Each year, earthworms move deep into soil during fall and winter and return toward spring and summer. what is the likely stimulis for this behavioral response
Each year, earthworms move deep into soil during fall and winter and return toward spring and summer. The likely stimulis for this behavioral response are relative humidity & temperature. Since the nematode breathes via the skin, the mucus coating may become dry & the organism would die if exposed to extreme cold & dryness.
true or false
Protozoans are the only organisms that can convert nitrogen from the air into chemical compounds that plants can use.
If false what is it
Answer:
The above statement is false.
Explanation:
Protozoans are not the organisms that can convert nitrogen from the air into chemical compounds that plants can use.
Bacteria and archaea are organisms that can convert nitrogen from the air into chemical compounds that plants can use. Organisms which can convert nitrogen to forms that can be used by plants such as ammonia are known as diazotrophs. Examples of such kind of organisms include Rhizobia and azospirillium.