The choice of whether a particular organism belongs to the experimental group or the control group should be based
on
a. age.
b. size.
c. chance.
d. history.
e. gender.
ANSWER: c
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Which of the following most accurately describes a polar covalent bond?
A. the interaction of a hydrogen connected to an atom with a high electronegativity, and an electronegative atom of another molecule B. the interaction of an atom with very high electronegativity and an atom with very low electronegativity C. the unequal sharing of electrons between an atom with a partial positive charge and an atom with a partial negative charge D. the equal sharing of electrons between atoms of identical or similar electronegativities E. None of these choices accurately describe polar covalent bonds.
With frequency-dependent selection, highest mortality can be expected in ____
a. the most abundant genotype b. the least abundant genotype c. the least well-adapted genotype d. heterozygous genotypes e. homozygous recessive genotypes
Where are the midbrain, medulla oblongata, and pons located?
a. spinal cord b. cerebellum c. brainstem d. cingulate gyrus
A relationship between two organisms in which both members benefit is said to be
a. parasitic. b. saprotrophic. c. mutualistic. d. heterotrophic.