Which of the following is TRUE of exotic
species?
a. In general, exotic species do not have
predators in their new location.
b. An exotic species is a species that evolved
in one region but has been introduced to
and become established in another.
c. An exotic species is often untroubled by
competitors.
d. An exotic species is often untroubled by
parasites and diseases.
e. All of these are true.
E
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Which of the following explains why leaf primordia develop in spiral or whorled patterns around the stem tip?
A. accumulation of auxin in the stem tip B. depletion of auxin near leaf primordia C. accumulation of auxin in leaf primordia D. loosening of cell walls E. None of these choices is correct
Plant breeders induce polyploidy in plants by using ________
a. selective breeding b. colchicine c. grafting d. tissue culture
Metagenomic studies of prokaryotes have
revealed that
a. there is very little diversity among bacteria. b. archaea are more closely related to bacteria than to eukaryotes. c. bacteria and archaea are essentially the same organisms. d. most archaea evolved from viruses. e. none of these things were revealed by metagenomic studies
The limnetic zone is the shallow-water area along the shore of a lake or pond. Indicate whether the statement is true or false