In some organisms, the primary function of a gene in a cell is to participate in regulating the body as a whole rather than responding to the cell's immediate environment. These organisms would be
A. diploid.
B. multicellular.
C. prokaryotic.
D. bacterial.
Answer: B
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The male reproductive system contains all of the following structures except the
a. seminal vesicles. b. prostate gland. c. clitoris. d. seminal vesicles. e. epididymis.
Starling's law of the heart states that the heart pumps:a
more forcefully when more blood is delivered to it. b. more rapidly when less blood is delivered to it. c. less forcefully when oxygen-rich blood is delivered to it. d. slower when more blood is delivered to it.
e. slower when norepinephrine is secreted.Water stores heat much longer than other substances do, allowing organisms to
a. heat themselves through evaporation. b. maintain a stable internal temperature. c. dissolve nonpolar compounds. d. maintain surface tension.
Adaptive immunity is sometimes also called acquired immunity. Which of the following statements provides a basis for the alternative name?
A) Lymphocytes of the adaptive immune system are highly specific for a single epitope. B) Activated lymphocytes produce daughter cells that are identical in specificity and function. C) To become activated, lymphocytes require exposure to the epitope for which they are specific. D) Activated lymphocytes may persist for years in the body. E) Lymphocytes reactive to normal body components are removed.