B- Enzymes act as catalysts to speed up chemical reactions
Evolution would be the answer you may be looking for.
It is B. Because you cannot give internal fertilization/ live birth inside.
Serotonin and n<span>orepinephrine.
Serotonin decreases appetite by activating </span>5-HT2C receptors<span> on dopamine-producing cells which will cause dopamine release to stop. Dopamine is responsible for the increase of appetite, therefore, serotonin decreases appetite.
Norepinephrine by increasing the production of glucose it also causes the body to feel satiety and, therefore, decreases the appetite.</span>
Answer:
i think its D
Explanation:
if thats wrong then im sorry lol
