In a bacterial cell, the chromosome is located in a region called the ______.
a. nucleoid
b. nuclei
c. nucleolus
d. nucleus
Answer: a. nucleoid
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The risk of heart attacks and stroke can be reduced by avoiding the conditions that damage the blood
vessel artheroslerotic plaque.
Indicate whether the statement is true or false.This animal has a small coelom, soft body, a
hinged two-part shell, and no distinct head. This animal is ___.
a. a clam b. a slug c. an octopus d. a planarian e. more than one of these
Signaling proteins that alert the immune system an infection is present and that sometimes directly fight pathogens are the:
A) histamines. B) complement proteins. C) antibodies. D) cytokines. E) antihistamines.
During an action potential, repolarization occurs _____
when sodium diffuses into the cell when potassium diffuses out of the cell when calcium ions diffuse into the synaptic knob only where sodium-potassium pumps are absent