What is the main determinant of biome distribution?

a. vegetation type
b. climate
c. ocean currents
d. elevation
e. weather


ANSWER: a

Biology & Microbiology

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Which of the following is/are true of the multipolar neurons?

a) The neurons are primarily sensory in nature b) The neurons are primarily motor in nature c) They may be part of the CNS d) They may be part of the PNS

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What is one mechanism by which a mutation can cause melanoma?

A) by the production of an altered BRAF protein that keeps melanocytes moving through the cell cycle B) by causing the accumulation of Huntington protein in melanocytes, which keeps them moving through the cell cycle C) by causing the accumulation of altered BRAF protein in germ-line cells D) by preventing the BRAF protein from being able to repair damaged DNA

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Regulatory proteins:a

defend against foreign invaders. b. store nutrients. c. catalyze a specific chemical reaction. d. control the expression of specific genes. e. strengthen and protect cells and tissues.

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Organisms that require high salt concentrations for growth are called

A. thermophiles. B. obligate halophiles. C. acidophiles. D. anaerobes.

Biology & Microbiology