Coccolithophores are abundant in:

a. cold marine waters.
b. tropical waters.
c. subtropical areas.
d. open ocean.
e. river mouths and estuaries.


A

Biology & Microbiology

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All of the following statements about population distribution are true EXCEPT

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Which of the following terms best characterizes catabolite repression associated with the lac operon in E. coli?

A) negative control B) constitutive C) repressible system D) positive control E) inducible system

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Membrane proteins that help move molecules across the plasma membrane are _______ proteins.

a) channel b) enzyme c) cytoskeleton d) cell recognition

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One of the factors that helps animal-pollinated flowering plants transfer pollen to plants of the same species is that

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Biology & Microbiology