The iron meteorites

a. never fall on the Earth.
b. are only found in the Antarctic.
c. are composed of carbonaceous chondrites.
d. are responsible for most of the meteor craters on the surface of the moon.
e. appear to have formed in the interiors of molten planetesimals.


e

Biology & Microbiology

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All of the following are true for Euglenas except the following:

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Reactions in which atoms are rearranged within a molecule are catalyzed by

A. hydrolases. B. isomerases. C. transferases. D. ligases. E. polymerases.

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Which of the following is a relationship between organisms that cannot evolve into a mutualistic relation-ship?

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