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Semenov [28]
2 years ago
11

Please help asap in 15 mintues !!!!

Biology
2 answers:
Aloiza [94]2 years ago
5 0

Answer:

D i think

Explanation:

MariettaO [177]2 years ago
3 0
The answer is C: they evolved from a common ancestor.

You can identify this by looking at the similar bone structure.

I hope this helps.
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Identify a signal the brain sends out after the nervous system sends the signal that pH has dropped.
spin [16.1K]

In response to a notification of a <u>decrease</u> in blood pH by the nervous system, the brain sends signals to the external intercostal muscles and the diaphragm.

<h3>What is blood pH?</h3>

Blood pH can be defined as a measure of the molar concentration of hydrogen ions that are present in the blood of a living organism, with respect to its acidity, neutrality or alkanlity (basicity).

In response to a notification of a <u>decrease</u> in blood pH by the nervous system, the brain would send signals (impulses) to the external intercostal muscles and the diaphragm through its respiratory center, so as to help the living organism increase its breathing rate and the volume of its lungs during inhalation.

Read more on blood pH here: brainly.com/question/11209525

6 0
2 years ago
Assume that a DNA double helix contains 100 base airs one pair is A-T or C-G and there 45 cytosines how many guaninas are there?
Semenov [28]
45 guanine, 55 adenines

Every cytosine needs a guanine to be a pair, so that is 45 pairs right there.
100-45 = 55
There should be 55 adenine and thymine pairs to fill in the remaining bases
4 0
2 years ago
Why does DNA need to replicate before cells divide?
Nonamiya [84]

Answer:

Below:

Explanation:

Replication is an essential process because, whenever a cell divides, the two new daughter cells must contain the same genetic information, or DNA, as the parent cell. ... Once the DNA in a cell is replicated, the cell can divide into two cells, each of which has an identical copy of the original DNA.

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2 years ago
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ANSWER PLEASE I NEED HELP. 50 POINTS
Vsevolod [243]
With chromosomes crossing over frequently, it's more likely that genetic defects will occur in offsprinfg.
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What natural force is responsible for the formation of the cliffs by the ocean in the picture?
anygoal [31]

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i think that the wind is responsible

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