In the universal ABO blood grouping system,
there are four phenotypes: A, B, AB, and O.
Various populations have different frequencies
of these four phenotypes but, in most
populations O is most common and AB least
common. The ABO blood grouping system
exemplifies
a. polymorphism.
b. genetic drift.
c. the bottleneck effect.
d. the Red Queen effect.
e. the founder effect.
A
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When the frequency of nerve impulses slows or stops even when the stimulus continues at constant
strength, the individual has undergone a. sensory adaptation. b. tolerance. c. perceptive degradation. d. nerve damage. e. tachyphylaxis.
In the accompanying figure, which groups are representatives of hominoids?
a. 1 and 2
b. 3 and 4
c. 7 and 8
d. 1 through 4
e. 5 through 9
Xylem sap is moved from the root system into what other structure in the plant body?
a. the tonoplast system b. the shoot system c. the taproots d. the trichomes
An informed statement that can be tested in a manner suited to the processes of science is known as a