What is the peculiarity of placentals? Who are the primates? Who are the pinnipeds?

The peculiarities of placentals are that the body temperature is constant, the BP cortex is well developed.
Non-human primates include chimpanzees, gorillas, orangutans, baboons, gibbons, and monkeys.
Pinnipeds are a detachment of marine animals with limbs in the form of flippers.



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