The process by which new species originate
A. is germination.
B. is extinction.
C. occurred only once in Earth's history.
D. is speciation.
E. occurred for millions of years but is no longer occurring.
D. is speciation.
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Each DNA strand serves as which of the
following during DNA synthesis?
a. a replicate b. a substitute c. a template d. a source of nucleotides e. all of these
Transgenic organisms can be created by
A) electroporation. B) direct injection. C) infection with a vector. D) cloning. E) electroporation, direct injection, or infection with a vector.
A forest fire is a density-independent population control factor
Indicate whether the statement is true or false
Living as a member of a group may have all of the following advantages except what?
A. increased feeding rate B. members learn about new food sources from other members C. greater protection from predators D. more individuals scan the environment for dangers E. being more resistant to disease and parasites