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Vikki [24]
3 years ago
5

A biologist is studying where a species lives and how it interacts with other species, which is a study of what?

Biology
1 answer:
Arada [10]3 years ago
7 0
It is a study of ECOSYSTEM and known as ECOLOGY......
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When does fetal erythrocyte production shift from the liver to the bone marrow?
vichka [17]

Answer: After seven months.

Explanation:

The blood carries various substances that must be transported from one part of the body to another. Red blood cells are an important component of the blood because their function is to carry oxygen to the body tissues and exchange it for carbon dioxide, which is carried and removed by the lungs.

Erythropoiesis is the process of red blood cell (erythrocyte) production. It is stimulated by a decrease in O2 in the circulation, detected by the kidneys, which then secretes the hormone erythropoietin. This hormone stimulates the proliferation and differentiation of red blood cell precursors, which triggers an increase in erythropoiesis in hematopoietic tissues and ultimately in the production of red blood cells. <u>In adults, red blood cells are formed in the red bone marrow.</u>

In early developing fetuses, erythropoiesis occurs in the mesodermal cells of the yolk sac. In the third or fourth month, erythropoiesis moves to the liver. After seven months, erythropoiesis occurs in the bone marrow.

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3 years ago
Give an example of a cell, a tissue, an organ, and an organ system that involves the heart
Luda [366]

Answer:

Epithelial cells,Muscle Cells

muscular, skeletal organs

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Explanation:

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In what order do the stages of prenatal development occur?
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 The process of prenatal development occurs in three main stages and they are listed in order;

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<span>2. </span>Embryonic Stage - begins at the beginning of the third week after conception. This stage plays an important role in the development of the brain.

<span>3.  </span>Fetal Stage - begins during the ninth week and lasts until birth.






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