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Oliga [24]
3 years ago
14

The heart is enclosed in a double-walled sac called the

Biology
1 answer:
Ket [755]3 years ago
5 0
This is known as the pericardium
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Which substances, released by glands, play an important role in communication between cells in a human?
Lelu [443]
Endocrine glands make chemicals called hormones and pass them straight into the bloodstream. Hormones can be thought of as chemical messages. From the blood stream, the hormones communicate with the body by heading towards their target cell to bring about a particular change or effect to that cell.Mar 30, 2014
8 0
3 years ago
What do the mitochandaria in our cells do with the glucose and oxygen molecules they obtain
Shalnov [3]

Answer:

adenosine triphosphate (ATP)

Explanation:

A quick overview Mitochondria (singular: mitochondrion) are rod-shaped organelles that are considered the power generators of the cell. During cellular respiration, mitochondria convert glucose and oxygen to produce adenosine triphosphate (ATP), which is the biochemical energy “currency” of the cell to do any cellular activities.

7 0
3 years ago
Please help :')
GREYUIT [131]

Answer:

True

Explanation:

4 0
3 years ago
3. Which of the following is not an X-linked trait?
alexandr1967 [171]

Answer:

Cystic fibrosis

Explanation:

X- linked trait may be defined as the trait  that is located on X chromosome or the inheritance of the trait is based on the X chromosome. The disorders associated with X-linked trait is known as sex linked disorder.

Cystic fibrosis is an autosomal recessive disorder that affects the digestive system, lungs and liver. The homozygous recessive condition is responsible for the disease cystic fibrosis. Hence, cystic fibrosis is not an X-linked trait.

Thus, the correct answer is option (2).

8 0
3 years ago
Why is cell differentiation necessary for the survival of multicellular organisms?
inn [45]

<u>Answer:</u>

The cell differentiation is necessary for the survival of multi-cellular organisms because at the beginning all the organisms start from a single cell called the zygote. This zygote undergoes mitosis and forms many uniform cells that do not have any specific function.

The differentiation of these cells is required for the development of specific organs and organ systems from this single cell.Cell differentiation is an essential process that gives a specific function to the cells of the body.

6 0
4 years ago
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