At the base of the food web in aquatic ecosystem are:a
algae.
b. Euglena.
c. plankton.
d. plants.
e. fish.
C
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When calculating the allele frequency for allele A in a population, why do you multiply the frequency of individuals who are homozygous for A by 2?
A. Because if A is dominant, it will show up twice as much. B. Because each individual homozygous for A has two copies of the allele. C. Because there are always twice as many homozygous individuals as heterozygous individuals. D. Because individuals homozygous for A will produce twice as many offspring. E. Because individuals homozygous for A will be twice as likely to survive.
Most cells in the body are in prophase.
a. true b. false
The seasonal cessation of activities accompanied by a reduction in metabolism in response to cold temperatures during winter is called
A) hibernation. B) torpor. C) heterothermy. D) diapause.
Why are new flu shots necessary every year?
A) The antiviral chemicals in flu shots last only 11 months. B) Flu shots do not result in the production of memory cells. C) Depending on the year, either bacteria or viruses cause the flu. D) Flu viruses have a high mutation rate.