Temperature is perhaps the most important factor in the distribution of organisms because
A. water is scarcer in warmer environments.
B. most organisms are unable to regulate their body temperature precisely.
C. many organisms are able to grow faster in warmer climates.
D. the metabolic optimum for endothermic animals is in temperate areas.
E. wind amplifies the effect of cool temperatures.
B. most organisms are unable to regulate their body temperature precisely.
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In genetic mapping, a map unit is defined as:
A. the distance between two genes. B. 1 millimeter. C. 1 micrometer. D. the distance between genes resulting in 1% recombination. E. the distance between genes resulting in 50% recombination.
"Sticky ends" are:a
the single-stranded ends of a DNA segment created by some restriction enzymes. b. a problem in recombinant DNA technology because they form loops of single-stranded DNA. c. double-stranded ends of a DNA segment created by some restriction enzymes. d. sites of the origin of replication in prokaryotes. e. sugar molecules that are bound to the ends of a DNA fragment
Much precipitation in the tropical rain forest is derived from:a
evaporation from lakes. b. evaporation from rivers. c. groundwater. d. transpiration. e. translocation.
The photosynthetic electron transport causes the accumulation of protons in which part of the chloroplast?
A. matrix B. stroma C. outer membrane D. internal thylakoid space