Chromatin consists of ____

a. only DNA
b. DNA and RNA
c. RNA only
d. DNA and associated proteins
e. proteins only in the nucleus


ANSWER: d

Biology & Microbiology

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A common organism of the temperate infralittoral fringe (lower intertidal) is called:

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Life history patterns of guppies in Trinidad are a result of which natural selection force?

a. Competition differences in different streams. b. Predation differences in different streams. c. Temperature differences in different streams. d. Pollution differences in different streams. e. Salt concentration differences in different streams.

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The first barrier to invasion is

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Natural selection drives evolution through the following forces except

A. competition for food. B. predators. C. climate. D. reproduction. E. competition for mates.

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