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Answer:

Why is it important to learn about stem cells and stem cell research?

Researchers hope stem cell studies can help to: Increase understanding of how diseases occur. By watching stem cells mature into cells in bones, heart muscle, nerves, and other organs and tissue, researchers may better understand how diseases and conditions develop.

How does stem cell research affect society?

Research with embryonic stem cells may lead to new, more effective treatments for serious human ailments and alleviate the suffering of thousands of people. Diseases such as juvenile diabetes, Parkinson's disease, heart failure and spinal cord injuries are examples.

For all living things to survive, stem cells are essential. As a result, stem cells might be necessary for the evolution of particular traits in animals, such as regeneration, multicellularity, and coloniality.

According to the stem cell theory of ageing, the inability of various stem cell types to continuously supply the tissues of the an organism by functional differentiated cells capable of preserving those tissues' original function leads to the ageing process.

In the body, stem cells have the capacity to differentiate into a wide variety of cell types. They act as the body's system for repairs. Adult stem cells and embryonic stem cells are the two primary categories of stem cells.

The evolution of particular traits in organisms, such as regeneration, multicellularity, and coloniality, may thus require stem cells.

Thus, for all living things to survive, stem cells are essential. As a result, stem cells might be necessary for the evolution of particular traits in animals, such as regeneration, multicellularity, and coloniality.

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Answer:

Interphase

Explanation:

Answer: gray matter

Explanation: The cerebral cortex is made up of gray matter (comprises cell bodies and dendrites) that covers the internal white matter. Cerebrum is made up of both gray and white matter and comprises both cell bodies and nerve fibers. The cerebrum is composed of two hemispheres.

Breathing is the process of inhaling oxygen and removing carbon dioxide. Just like oxygen and carbon dioxide, Water vapor also have different amounts in inhaled and exhaled air.

The process of inhaling oxygen and releasing carbon dioxide and releasing energy is called respiration.

The first step towards respiration is breathing, which is done by inhaling oxygen and exhaling carbon dioxide through nostrils.

The amount of different gases varies in environment.

During breathing amount of inhaled air contains different percentage of oxygen and carbon dioxide as compared to exhalation.

The reason for such variation includes the use oxygen from the inhaled air to release energy and give out carbon dioxide as a byproduct by the cell.

Water vapor is also inhaled and exhaled in different amounts just like oxygen and carbon dioxide.

Thus, the correct option is C.

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Answer:

C ) water vapor (H2O)

Explanation:

Ethical concerns over whether or not we should be editing the genes of organisms is the field of biotechnology. Thus option A is correct.

The branch of science that deals with application of technology to the biological organisms for the sustainable development, it has a broad range of applications from medical to agricultural sectors

It provide nutrient supplements like Golden rice which is most accepted supplement food prepared by the addition of beta-carotene into the rice.

It help the crops to handle abiotic stress like cold, drought, salinity, harsh climatic conditions etc.

In industry it has huge amount of application like production of alcohol, cosmetic products, even biological element production and cellular structures.

It has been widely used in the field of energy production such as Biofuels which is alternative source of natural resource, it is also eco friendly and not release green house gases.

It is applied in pharmaceutical industries. Thus option A is correct.

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Cell-mediated immune reaction involve the destruction of infected cells by cytotoxic T cells, or the ruin of intracellular pathogens by macrophages The activation of naive T cells in reaction to antigen, and their subsequent expansions and differentiation, constitutes a primary immune response.

The viruses connect to cells within the nasal routes and throat. The influenza virus's hemagglutinin (HA) surface proteins then lash to the sialic acid receptors on the surface of a human respiratory tract cell.

Thus, Cell-mediated immune reaction involve the destruction of infected cells by cytotoxic T cells, or the ruin of intracellular pathogens by macrophages.

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Answer:

hi

Explanation:

By focusing efforts on the total number of species, they allow conservationists to avoid the hard science required to decide which species matter most to ecosystems and the hard choices required to decide which species matter most to us.

mitotic spindle is the answer

During anaphase mitotic spindle is attached at the centromere of each sister chromatid because it attaches the chromosome to the opposite spindle pole.

Protein complexes connect microtubules to the chromosomal midpoint (the centromere) (kinetochores). The connected microtubules depolymerize and shorten, causing movement that pushes chromosomes toward centrosomes situated at either pole of the cell.

The mitotic spindle is a structure that separates the chromosomes. The mitotic spindle is composed of multiple long proteins known as microtubules that are connected to a chromosome at one end and to the cell pole at the other.

The anaphase stage in the cell cycle prepares to spare sister chromatids reday for moves it toward the opposite spindle pole.

Therefore mitotic spindle is seen centromere of each sister chromatid as they separate and move toward the spindle pole.

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Answer:

1. fossil fuel

2.natural gas

Answer:

It has absorbed about 25% of the carbon dioxide generated by fossil fuel burning and other human activity and has slowed warming by also absorbing heat. Global warming causes melting of ice on land such as glaciers, and ice sheets in Antarctica and Greenland, adding water to the ocean, and thus raising sea level.

Explanation:

Credit: https://royalsociety.org/

Answer:

GABA or gamma-aminobutyric acid is the most important of the inhibitory neurotransmitters in the nervous system. It is the most abundant of them, and it is distributed throughout the brain and spinal cord.

Explanation:

Answer:

15.625 g of a 500 gram sample of potassium-42 with 12.4 hours of Half -life is left after 62 hours.

The half-life is the time after which half of the initial quantity of a radioactive substance is left .

Given here,

The half-life of K-42 = 12.4 hours

The initial quantity of K-42 = 500 gm

The final quantity after 62 hours = ?

The number of half cycle

\bold { = 62\times \dfrac 1{12.4} = 5,}=62×

12.4

1

=5,

Thus the number of half life cycles in 62 hours is 5,

After 1 half life \bold {= \dfrac {500}{2} = 250}=

2

500

=250

After 2 half lives \bold {= \dfrac {250}{2} = 125}=

2

250

=125

After 3 half lives \bold {= \dfrac {125}{2} = 62.5}=

2

125

=62.5

After 4 half lives \begin{gathered}\bold {= \dfrac {62.5}{2} = 31.25}\\\end{gathered}

=

2

62.5

=31.25

After 5 half lives \begin{gathered}\bold {= \dfrac {31.25}{2} = 12.625}\\\end{gathered}

=

2

31.25

=12.625

15.625 g of a 500 gram sample of potassium-42 with 12.4 hours of Half -life is left after 62 hours.

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BRAIN LESS ANSWER

ANSWER IS THAT CRRECT

Answer:

what happens inside a nucleus in interphase

Answer:

1.true

2.true

3.false

4.true

Explanation:

hope this help

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Answer:

D: Convenience factors

Explanation:

Answer:

D - Convenience factors

Explanation:

I just took the test

Answer:

barnacles, oysters, mussels, sponges, worms, snails, small fish, crabs, jellyfish, shrimps, frogs, many amphibians and birds

Communities that are formed in the marine ecosystem on foreign bodies are called biofouling community.

It is common that sometimes, strange bodies are introduced into the marine ecosystem and this may lead to the budding new communities.

When a foreign body such as in this case, the sunken ship begins to host a new community of organisms, the new community is called a biofouling community.

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A lack of any one of several vitamins — B12, folate (also known as folic acid), or vitamin C — causes vitamin deficiency anemia.

So the answer is D.

Answer:

The evolution of the peppered moth is an evolutionary instance of directional colour change in the moth population as a consequence of air pollution during the Industrial Revolution. The frequency of dark-coloured moths increased at that time, an example of industrial melanism.

Explanation:

The peppered moth's evolution is an example of how air pollution during the Industrial Revolution caused directional colour changes in the moth population.

The process of evolution is how organisms change over time in response to their environment.

Any net direction change or cumulative change in an organism's or population's features over many generations is considered evolution, or descent with modification.

The genesis and dissemination of alleles, variations, trait values, or character states are expressly mentioned.

The evolution of the peppered moth is an illustration of how moth population changes in directional colour were brought on by air pollution during the Industrial Revolution.

At that time, a manifestation of industrial melanism was the rise in the number of dark-colored moths.

Thus, this way, the peppered moth change in response to the pollution in its environment.

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Answer:

increasing bacterial activity as organic matter decays

Explanation:

that would be your answer

Dissolved oxygen concentrations drop quickly downstream from a point-source input of organic matter into the river due to the breakdown of organic compounds by bacteria.

hence the DO is reduced in downstream due to breaking down of bacterial products.

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Answer:

Something not easily broken down in biology is referring to a persistent pesticide.

I believe God is telling Joshua to remember what he has read in the Bible and to study it day and night. Also to obey it and then he shall be wise and a successful man.

Answer:

He called this movement continental drift.

Explanation:

Answer:

The eustachian tube, or auditory tube

Explanation:

The main limiting factor for the plants and animals that live , These cold winter temperatures are the main limiting factor for the plants and animals that live here.

Migration and hibernation are two adaptations that many of the Deciduous Forest animals have. Animals that hibernate will eat heavily before the winter and their coats will grow quite thick to keep them warm through the winter hibernation period.

Thus, the temperature is the correct answer.

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Answer:

the answer is F

Explanation:

i just took the test and got it right

Answer:

False

Explanation:

trusttttt

Answer:

the inward district of an organ or tissue, particularly when it is unmistakable from the external area or cortex (as in a kidney, an adrenal organ, or hair).

"the adrenal medulla produces adrenaline"

What do legal researchers involve this for? Scientific researchers might search for the presence or nonappearance of a medulla, which is a bunch of cells that goes through a hair. The medulla is ordinarily unique relying upon the species that the hair came from, which makes it one method for recognizing creature and human hair.