The type of movement that is specific and requires carrier molecules and energy is

A. active transport.
B. exocytosis.
C. facilitated diffusion.
D. osmosis.
E. endocytosis.


Answer: A

Biology & Microbiology

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A "structuralist" biologist would explain an organism's features as the result of ________

A) natural selection acting on random, small-scale variation B) the inheritance of traits acquired over an individual's lifetime C) principles of mathematics and physics that determine form and function D) major "leaps" or "jumps" in phenotype within one generation E) divine intervention in an organism's DNA

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The only genes necessary for the retroviral lifecycle are gag and pol

Indicate whether the statement is true or false

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