People who undergo radiation therapy sometimes develop anemia resulting from a decreased production of red blood
cells. This is because radiation affects:a.
spongy bone.
b. osteoblasts.
c. osteoclasts.
d. lacunae.
e. metaphysis.
a
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According to the competitive exclusion principle, two species cannot continue to occupy the same _____
A) habitat B) niche C) territory D) range E) biome
Which of the following steps in cell crawling is accompanied by Arp2/3-dependent actin polymerization at the leading edge?
A) initiation B) protrusion C) attachment D) contractile activities E) both choices A and D
Protists are
a. autotrophic. b. heterotrophic. c. unicellular. d. multicellular. e. all of these.
If needed (as in the absence of insulin), fatty acids in the liver can be metabolized and used for energy. The eventual breakdown products of fatty acids in the liver are known as:
A) Ketone bodies B) Glycoleins C) Amino acids D) Pyruvic acids