The evidence for industrial melanism being caused by an increase in the dark allele was provided from field tests carried out by
A. Lamarck.
B. Wallace.
C. Darwin.
D. Kettlewell.
E. Tutt.
Answer: D
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Abrupt genetic changes that quickly lead to the reproductive isolation of a group of individuals is
likely to lead to
a. sympatric speciation. b. allopatric speciation. c. extinction. d. mutation. e. anagenesis.
Changes that have occurred in living organisms over the past four billion years are due primarily to
A. extinction of species. B. continental drift. C. changes in geological periods. D. interaction of genetic and environmental changes. E. the change in the orbit of the moon, causing mass extinction due to volcanic activity.
Negatively charged particles in the soil are referred to as
A) mollisol. B) entisol. C) cations. D) colloids.
Neurons known as "pacemaker" cells:
A) are the output cells for oscillator circuits B) have inherent spontaneous rhythms C) control heart heart D) None of the above