Over hundreds of millions of years, high pressure and temperature transformed ____ into deposits of oil and natural

gas.


a. coal
b. land animal remains
c. land plant remains
d. plankton remains
e. sedimentary rock


ANSWER: d

Biology & Microbiology

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Is it possible for crossing-over to occur between two linked genes, yet for all of the resulting offspring to have parental genotypes?

What will be an ideal response?

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