That their ancestors were related
<span>B. The food supply diminishes in all socioeconmic classes.</span>
Answer:
I think D) Glycolysis
Explanation:
<em>Glycolysis</em> is the <em><u>first pathway</u></em> used in the breakdown of glucose to extract energy. It takes place in the cytoplasm of both prokaryotic and eukaryotic cells. It was probably one of the earliest metabolic pathways to evolve since it is used by nearly all of the organisms on earth.
<span>a. direction in which they carry impulses</span>
The temperature would be the independent variable because it is what is being changed or controlled to test the effects.