Lamprey populations introduced into the Great Lakes have grown dramatically. Why?
A) Competitive species have driven them from the ocean.
B) Fishers have intentionally introduced them with the hope of farming them for "eel skin."
C) They have no natural predators in these waters.
D) Lamprey stocking programs have been highly effective.
E) A fish species that they naturally prey upon has recently been introduced into the Great Lakes.
C
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Histamines
a. are produced by phagocytes to cause mucous production. b. are produced by mast cells to cause prostaglandin production. c. are produced by complement to attract phagocytes. d. are produced by mast cells to cause capillary dilation. e. are produced by complement to cause capillary constriction.
Four of the following are typical features of anthropoids. Which one is the exception?
a. diurnal b. good eyesight c. color vision d. carnivorous e. dry nose
Which of the following lacks sufficient penetrating power for bulk sterilization?
A. Gamma radiation B. Ultraviolet (UV) radiation at 260 nm C. Alpha and beta particles D. X rays
As part of the fertilization process, the egg completes meiosis I
____________________ Indicate whether the statement is true or false.