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Question 1

1. Which living organisms are most closely related to humans?

Answer 1

Hominidae-apes ex: chimpanzees, apes, gorillas, orangutans

Question 2

2. Which living organisms that aren’t members of the family Hominidae are most closely related to humans?

Answer 2

-Primates

Question 3

What characteristics do humans share with all other mammals?

Answer 3

Hair, mammary glands, 3 ear bones

Question 4

Humans, like all mammals, are synapsids. What does this mean?

Answer 4

All mammals are synapsids because they have an opening in the skull below the eye

Question 5

What characteristics do humans share with all other chordates?

Answer 5

gill slits, notochords, dorsal hollow/ cords tails

Question 6

6. Why do we say that humans, like many animals, have a “tube-within-a-tube” body plan?

Answer 6

We have a “tube within a tube” body plan due to having the digestive system the mouth to esophagus through digestive system to anus and then we have our skeletal, muscles and fluid on the “outside” of that system (“fluid-filled body cavities surrounding the gut”