Which of the following phrases describes a type of natural selection in which the mean characteristics of a population are preserved?
a) gemone selection
b) artificial selection
c) directional selection
d) stabilizing selection
e) disruptive selection
Ans: d) stabilizing selection
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Cnidarians of the class ____ are responsible for building coral reefs
a. Anthozoa b. Hydrozoa c. Cubozoa d. Scyphozoa e. Palyzoa.
In the Hardy-Weinberg equation, the term q2 refers to the frequency of
a. a recessive allele of a given locus. b. the frequency of a homozygous recessive genotype at a given locus. c. the frequency of all recessive alleles in a population. d. the frequency of a heterozygous genotype at a given locus. e. the frequency of a homozygous dominant genotype at a given locus.
Mendel's "factors" for inheritance are now called ________.
Fill in the blank(s) with the appropriate word(s).
Central coordination of vertebrate biological rhythms in physiology and behavior reside in the _____
A) pituitary gland B) hypothalamus C) cerebrum D) thalamus