Which of the following may have been a contributing factor of the success of the therapsids.
a.
they developed placentas.
b.
they had legs that extended outward from the body.
c.
they were herbivores.
d.
they were endothermic.

In my view, correct answer is d.They were endothermic. There is a big difference between endothermic homeothermic. Homeothermic organisms can maintain a internal cellular condition which is very close to the metabolic optimal condition for the organism referring to its environment.

The answer to this question is a.

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