Moths have an immunoglobulin-family protein called ____, which binds to pathogens and enhances their
phagocytosis.
a. hemolysin
b. cadherin
c. interleukin
d. hemolin
e. defensin
ANSWER: d
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The diploid number of a roundworm species is 4. Assuming there is no crossover, and random segregation of homologues during meiosis, how many different possible combinations of chromosomes might there be in the offspring
(not including variety generated by crossing over)? A) 4 B) 8 C) 16 D) 64
Carbon dioxide dissolves in water to form ____
Fill in the blank with the appropriate word.
Which statement best describes the movement of water in this system?
a. Water moves in both directions, but net movement is from A to B. b. Water only moves from A to B. c. Water moves in both directions, but net movement is from B to A. d. Water only moves from B to A. e. There is no net movement of water.
Pathogens can obtain iron from the body using
A) siderophores or transferrin. B) proteases. C) siderophores. D) lipases. E) transferrin.