Which of the following is false regarding cnidarians?
A. They have an outer epidermis and inner
endodermis, in between which is a gelatinous
mesoglea.
B. Cnidarians have a wider variety of cells
types than sponges—allowing more
sophisticated tissue function.
C. Many cnidarians are predators rather than
passive filter feeders
D. Cnidarians have a separate opening for
the anus and the mouth.
D
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Biological diversity is composed of what three levels?
A. trophic diversity, ecosystem diversity, and species diversity. B. ecosystem diversity, species diversity, and process diversity. C. genetic diversity, function diversity, and process diversity. D. genetic diversity, species diversity, and ecosystem diversity.
Sickle-cell anemia results from a beta-globin protein containing the amino acid valine in the place of the amino acid glutamic acid. This is an example of a ________ causing a disease.
A) microbiome B) gene pool C) multifactorial trait D) mutation
Males with one copy of an X-linked gene are said to be ________ for that gene.
A) homozygous B) heteroallelic C) heterozygous D) hemizygous E) deficient
Many types of social behavior involve cooperative behavior. The major purpose of a pair bond is to
form a stable relationship for the purpose of: a. securing food. b. defending territory. c. kin selection. d. mating and caring for young. e. selection of a mate.