Gametophytes are
a. haploid plants that produce spores.
b. diploid plants that produce spores.
c. haploid plants that produce gametes.
d. diploid plants that produce gametes.
e. diploid or haploid plants that produce
gametes.
C
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The oldest microfossils are of
A. prokaryotes. B. eukaryotes. C. insects. D. pollen grains. E. small animals.
What is the term for the estimated total availability of organic matter for food?
a. annual biomass production b. above-ground biomass c. net primary productivity d. gross biomass volume
__________ relieve allergy symptoms by dampening
the effects of histamines. Fill in the blank(s) with the appropriate word(s).
What is a possible cause of the chromosomal aberration called a "duplication"?
A) a chromosome fragment that breaks off and does not rejoin any chromosome B) nondisjunction C) exchange between non-homologous chromosomes D) unequal crossing over E) breaking of a chromosome fragment, then rejoining in a flipped orientation