Four of the five answers listed below are
produced by the same germ layer. Select the
EXCEPTION.
a. nervous system
b. muscle system
c. circulatory system
d. reproductive system
e. excretory system
A
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Which of the following is NOT a function of the integumentary system?
A. Defense against pathogens B. Fluid transport C. Supporting the weight of body structures D. Protection from dehydration E. Regulation of body temperature
A cover, or ________, is used by certain gastropods when they retreat into their shell and close the opening
a. operculum b. periostracum c. univalve d. radula
A human X-linked recessive gene may be
a. found on the Y chromosome. b. passed to daughters from their fathers. c. passed to sons from their mothers. d. expressed more commonly among females. e. both passed to daughters from their fathers and passed to sons from their mothers.
The lectin pathway for complement action is initiated by
A) mannose on host membranes. B) mannose on the surface of microbes. C) lectins of the microbe. D) gram-negative cell walls. E) gram-positive cell walls.