Which of the following events would NOT be expected to occur during a strong El Niño year?
a. heavy rains in the central and eastern Pacific ocean
b. upwelling of cold water along the west coast of the Americas
c. death of phytoplankton in western coastal areas
d. warm surface currents flowing from west to east
e. weakened equatorial winds
B
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Which reproductive isolating mechanism is displayed in a mule, the product of a cross between a horse and a donkey?
a. mechanical isolation b. hybrid inviability c. hybrid sterility d. hybrid breakdown e. temporal isolation
The emergence of land plants correlated with the near ____ of the genes that bryophytes inherited from a(n)____
ancestor.
a. doubling; liverwort b. doubling; algal c. tripling; liverwort d. tripling; algal e. quadrupling; algal
A broad land or ocean region defined by
climate, geography, and producers is called a. an ecoregion. b. a hot spot. c. a realm. d. a habitat island. e. the biosphere
Insulin and glucagon exhibit which type of hormone interaction?
a. synergistic b. permissive c. opposing d. unrelating e. mutual