Yeast cells undergoing alcoholic fermentation produce
(a) glucose.
(b) ethanol.
(c) H2O.
(d) all of the above.
(b) ethanol.
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Functional traits can be shared between organisms with divergent SSU rRNA sequences because
A) functional traits may be lost by different lineages over time. B) functional traits may evolve independently in different lineages over time. C) horizontal gene transfer can result in the transfer of genes between divergent lineages. D) functional traits may evolve independently, be shared through horizontal gene transfer, or be lost in divergent lineages.
An abrupt reversal in the electric gradient across the neuron plasma membrane is called a(n):
a. resting potential b. membrane potential c. action potential d. ion concentration gradient e. electrochemical signal
If the first living things were autotrophs, they
A. would have used organic molecules as a source of energy. B. would have engaged in photosynthesis. C. would have engaged in chemosynthesis. D. All of these answers are true.
Herbivores would usually be placed in which trophic level?
A) third B) either the third or fourth C) second D) fourth E) first