Most animal lineages evolved during the ____ period
a. Cretaceous
b. Devonian
c. Ordovician
d. Silurian
e. Cambrian
ANSWER: e
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Review the experiment illustrated in Figure 8.7
Experiment #2 and on what you know about photosynthesis, which of the 2-D paper chromatography patterns below would be observed if the cells treated with C14 had been allowed to remain in culture for a longer period of time before they were put in the boiling alcohol? What will be an ideal response?
DNA and RNA are alike in
a. the pentose sugar. b. all the nitrogenous bases used to assemble the genetic code. c. the number of strands. d. their function in genetics. e. none of these.
As the size of a population approaches the carrying capacity
A. the number of births and deaths are about equal. B. the population is in the lag phase. C. density-dependent limiting factors are not important. D. the biomass decreases.
Which species is most likely to become extinct?
A) The jack-in-the-pulpit, found throughout the eastern United States and Canada B) The northeastern pygmy shrew, found throughout New Jersey and Pennsylvania C) The white tiger beetle, found throughout several mid-Atlantic U.S. states D) Kirtland's warbler, which breeds in only a small area of Michigan E) Carp, found throughout Europe, the United States, and Canada