Which two species are believed to have evolved from Homo ergaster?
A. Homo habilis & Cro Magnon man
B. Homo erectus & Homo rudolfensis
C. Homo erectus & Homo floresiensis
D. Homo rudolfensis & Homo floresiensis
Answer: C
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The part of a membrane protein that extends through the phospholipid bilayer is primarily composed of amino acids that are
A. highly polar. B. negatively charged. C. non-polar. D. positively charged. E. water soluble.
In the spongy bone, which of the following produces blood cells?
A) yellow marrow B) osteons C) osteocytes D) red marrow
Which human activity has directly contributed to global warming?
A) burning of coal B) building of greenhouses C) planting of trees D) development of solar energy
Fast neurons as described in lecture require cytoplasmic signal transduction to open an ion channel.
a. true b. false