Mutations can be
a. random.
b. beneficial.
c. lethal.
d. heritable.
e. all of these.
Answer: e
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The absence of sweat glands in cetaceans aids in
a. maintaining body heat. b. conserving water. c. increasing internal salinity. d. reducing drag. e. swimming efficiency.
Mendel observed that some genetic traits seemed to mask others in the pea plants, and used the term ___ to describe these traits.
a. dominant b. homologous c. heterozygous d. recessive e. homozygous
Species interactions between members of a
community include __________, which is helpful to one species and does not harm the other species. Fill in the blank(s) with the appropriate word(s).
When might cytosol leak into plant cell vacuoles?
A) if water freezes outside a plant cell B) if water freezes inside a plant cell C) if severe drought conditions shut down normal rates of transpiration D) if the critical night length isn't met