Carrier proteins are often used by the cell to transport ____

a. H2O
b. proteins
c. amino acids
d. steroid hormones
e. CO2


ANSWER: c

Biology & Microbiology

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In cases of the “winter blues” treatment with a bright

artificial light can reduce the effects by a. increasing thyroid gland activity. b. decreasing pineal gland activity. c. increasing gonadal output. d. pancreas reduction. e. kidney adrenal gland activation.

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A woman with type B blood and a man with type A blood could have children with which of the following phenotypes?

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Which extinct hominin first appeared about 1.9 million years ago and had a larger brain than Homo habilis, its immediate predecessor?

A) Homo ergaster B) Homo neanderthalensis C) Homo sapiens D) Australopithecus

Biology & Microbiology