In the hydrologic cycle, water moves from the land to the air by ____ and returns to the land via ____
a. precipitation; evaporation and transpiration
b. precipitation and evaporation; transpiration
c. precipitation and transpiration; evaporation
d. transpiration; precipitation and evaporation
e. transpiration and evaporation; precipitation
E
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A point mutation that creates a premature stop codon is called a _____
A. synonymous (silent) mutation B. nonsynonymous (missense) mutation C. nonsense mutation D. translation mutation E. transition mutation
You are surveying biodiversity on a new island chain. You have counted the number of bird species on one island already. The next island is larger and closer to the mainland than the one you have just surveyed
According to the theory of island biogeography, the total number of its bird species should be ____ than on the current island because the rate of immigration to the new island should be ____ and the rate of extinction should be ____ . Refer to Figure 46.17 in your text for help. Fill in the blank with the appropriate word.
Members of the genus Rhizobium
A. infect broad-leaved plants and cause crown gall disease. B. are important nitrifying bacteria that convert nitrite to nitrate. C. are free living soil bacteria that fix nitrogen. D. grow symbiotically in root nodules of legumes where they fix nitrogen.
As temperatures continue to rise, the photosynthetic rate reaches a maximum related to
A) the temperature response of rubisco. B) the thickness of the boundary layer. C) soil temperature. D) oxygen availability.