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Komok [63]
3 years ago
15

What led to the development of body systems?​

Biology
1 answer:
valentinak56 [21]3 years ago
8 0
In comparison to the embryo, the fetus has more recognizable external features and a more complete set of developing organs. The entire process of embryonic development involves coordinated spatial and temporal changes in gene expression, cell growth and cellular differentiation.
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The __________ are formed in red bone marrow and then migrate to tissues throughout the body. these blood cells destroy parasiti
docker41 [41]

Answer:

Eosinophils

Explanation:

These are type of White blood cells W.B.C ,present almost 2% of white cells . About twice the size of red blood cells , Nucleus is bi lobed . They are often used for parasite attack , Inactivate inflammation and production of substances .

4 0
3 years ago
From which substrate is the first carbon dioxide molecule released during cellular respiration?
Natasha2012 [34]
D- Citrate ( also called C)
6 0
2 years ago
What is so special about nitrogen in the atmosphere
HACTEHA [7]

Answer:

Firstly, the partial pressure of nitrogen (78%) is crucial to breathing purposes. Without this pressure, the lungs will burst and animals cannot survive.

Secondly, nitrogen is required for the formation of amino acids (building blocks of proteins) and other organic compounds that are necessary for the survival of living organisms. Principally, in the atmosphere, nitrogen is present in the form of molecular nitrogen (N2). N2 is fixed by nitrogen-fixing bacteria that form nitrates and nitrites. These molecules are then used in biochemical processes to produce proteins (amino acids) and other organic compounds. In the absence of nitrogen, these processes could become seize of limited significantly thus affecting life overall.

Thirdly, nitrogen and its derivatives act as greenhouse gases that maintain the Earth's temperature within a range that supports life. Yes, the increased abundance of nitrous oxides is not good because of acid rain and other issues, however, still, the presence of nitrogen is important for life on this planet.

5 0
3 years ago
Between Point A and Point C, where is the steepest part of the hike? How do you know?
Shalnov [3]

Answer:

Going down Burr Hill; the contour lines are close together.

Explanation:

Between Points A and C, the steepest part is going down Burr Hill.

I know that, because the contour lines are so close together.

That means your vertical descent is quite steep compared to the distance you cover horizontally.

5 0
3 years ago
When a cell divides to make two new cells, it copies its DNA first. This is called DNA replication. Why do you think this is imp
Harlamova29_29 [7]

Answer:

DNA replication is important because without it, cell division could not occur. With DNA replication, the set of DNA of a cell can be duplicated and then each cell that results from division can have its own entire set of DNA, and cell division can theoretically continue indefinitely.

6 0
3 years ago
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