Which of the following are classified as pyrimidines?

A) adenine and thymine
B) guanine and cytosine
C) adenine and guanine
D) thymine and cytosine
E) adenine and uracil


D

Biology & Microbiology

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_____ is the process in which two groups of organisms living in the same habitat diverge into separate species

A. allopatric speciation B. peripatric speciation C. adaptive radiation D. co-speciation E. sympatric speciation

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Vas deferens are where what happens?

What will be an ideal response?

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List at least three environmental agents or factors that are known to cause cancer

What will be an ideal response?

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Mutations affect Hardy-Weinberg equilibrium by

A. allowing gene flow to increase. B. keeping allele frequencies unchanged between generations. C. decreasing the genetic variation that affects natural selection. D. altering frequencies of particular alleles within a population.

Biology & Microbiology