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1

An important primate characteristic that allows us to encircle and grasp objects with our hand is our thumb.
2

The only surviving species of bipedal primates is .
3

Evolution through the mechanism of natural selection was proposed by .
4

Features of a species that evolve in response to selection pressures and enable the organism to cope with the environmental challenges are called .
5

The knee is to the foot.
6

The skin is to the muscles.
7

The nose is to the ears.
8

Organs that are in the abdominal cavity but not enclosed by the peritoneum are said to be .
9

The skin, hair, nails, and cutaneous glands belong to the system.







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