In DNA, the purines are ____

a. thymine and cytosine
b. adenine and cytosine
c. adenine and guanine
d. thymine and adenine
e. guanine and thymine


ANSWER: c

Biology & Microbiology

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The diagram shows a cell in metaphase. What process occurs in the next phase?



a. A cleavage furrow forms, separating the cells.
b. Chromosomes reach their maximum density.
c. Polar microtubules extend, elongating the cell.
d. Nuclear envelopes form around the chromosomes.

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Four of the five answers listed below are actively involved in nerve impulse transmission. Select the

exception. a. neuroglia b. neuron c. ganglia d. nerves e. tracts

Biology & Microbiology

Which of the following factors can affect carrying capacity?

A. Population size B. Human activity C. Growth rate D. Natural selection E. Generation time

Biology & Microbiology

Explain how and why healthcare epidemiology programs are essential to quality care

What will be an ideal response?

Biology & Microbiology