Which of the following can cause evolutionary change in a small population?
A) Homozygous individuals
B) Lack of mutations
C) Genetic drift
D) Lack of gene flow
E) All recessive alleles
C
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Instinctive behaviors that are performed in exactly the same way every time they are triggered are
defined as ____.
a. sign stimuli b. fixed action patterns c. releasers d. habitual behaviors e. conditioned behaviors
Two types of polygamy are:
a. kin selection and reciprocal altruism. b. polygyny and polyandry. c. polygyny and monogamy. d. internal and external. e. isogamy and anisogamy.
Myrmecia pilosula (the bulldog ant) actually consists of several virtually identical, closely related species, with females having chromosome numbers of 18, 20, 32, 48, 60, 62, and 64. Assume one crossed a female of species (
A) with 32 chromosomes and a male of species (B) with 9 chromosomes (males are haploid, and each gamete contains the n complement). How many chromosomes would one expect in the body (somatic) cells of the female offspring? A) 9 B) 4.5 C) 32 D) 41 E) 25
A primary immune response is the ________
A) production of primary-type antibodies in the first day of exposure to a microorganism
B) immune response elicited by the second exposure of lymphocytes to a particular antigen
C) immune response elicited by the first exposure of lymphocytes to a particular antigen
D) immune response elicited by the first exposure of memory cells to a particular antigen