Footprints in Tanzania indicate our hominin

ancestors were walking upright as early as ___
million years ago.



a. 36
b. 3.6
c. 6
d. 2.7
e. 360


B

Biology & Microbiology

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Answer the following statement true (T) or false (F)

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Too little cortisol may lead to

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The exchange of gases between the lungs and the blood occurs by the process of

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Answer the following statement true (T) or false (F)

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