A defibrillator contains two paddles that are placed on the chest of a person and an electrical shock is administered. What is this procedure treating?
A. aneurysm
B. heart attack due to atherosclerosis
C. anemia
D. tachycardia
E. arrhythmia
E. arrhythmia
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What is it called when the gene pool is fluxing because of the migration of individuals?
a. natural selection b. mutation c. gene flow d. genetic drift
The favoring of the heterozygote within the
population is an example of a
a. balanced polymorphism. b. genetic drift. c. the Red Queen effect. d. sexual selection. e. disruptive selection.
Chemicals that are poisonous to specific cell types are said to be
a. hazardous. b. cytotoxic. c. allelochemicals. d. bioactive.
Von Baer proposed that diagnostic traits for distinguishing species among vertebrates appear at the:
a. earliest stages of development. b. latest stages of development. c. earliest and latest stages of development. d. middle stages of development.