Answer the question using the accompanying figure. During metamorphosis of a tadpole, TSH is active at ____
a. A
b. B
c. C
d. B and C
e. A, B, and C
ANSWER: c
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Mice that are injected with only the R strain of Streptococcus pneumoniae
a. become sick for prolonged periods of time. b. stay healthy, because their immune systems can kill this strain easily. c. are killed, because R strain cells are deadly.
Treatment with glucocorticoids to suppress type IV hypersensitivity may result in
A) acquired immunodeficiency. B) anaphylaxis. C) autoimmune disease. D) DiGeorge syndrome. E) primary immunodeficiency.
Segments of DNA that can move from one place to another within a cell’s genome are called ____
a. target sites b. transposases c. transposable elements d. replicative factors e. release factors
When a ruminant "chews his cud," it involves regurgitation from which two digestive chambers?
a. abomasum and omasum b. abomasum and rumen c. omasum and rumen d. rumen and reticulum e. reticulum and omasum