Breathing is the exchange of gases between animals & the environment.
Answer:
C
Explanation:
Positive natural selection, or the tendency of beneficial traits to increase in prevalence (frequency) in a population, is the driving force behind adaptive evolution. ... At the molecular level, selection occurs when a particular DNA variant becomes more common because of its effect on the organisms that carry it.
Answer:
an ANTIGEN
Explanation:
a foreign substance that invades your body is called an <u>A</u><u>N</u><u>T</u><u>I</u><u>G</u><u>E</u><u>N</u>. 8. When your body detects an antigen, antibodies are made and lock onto it. Once an antigen is recognized, your immune system can remember it the next time and protect you from getting sick again.
Answer:
D, all of these are included in the biosphere
Intermediate and deep focus earthquakes. The reason is being the tectonics plates are always shifting and so, old it’s always able to cause a problem. The tectonic plates crash at some point. Usually it’s a small one at first, then a big one, and after that a aftershock which is bigger than the second one.
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