Which of the following mammalian lineages contains organisms that lay eggs?

a. Strepsirhini
b. monotremes
c. Rodentia
d. Haplorhini
e. marsupials


B

Biology & Microbiology

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Estimates of spontaneous mutation rates are made using dominant disorders because

A) it takes several generations for the phenotype to change. B) they do not affect offspring. C) the mutant phenotype is obvious. D) they can be identified by DNA sequencing.

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The process illustrated in the figure is a step in

a. the production of recombinant DNA. b. probing for transferred genes. c. DNA fingerprinting. d. sequencing DNA. e. producing radioactive probes.

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What is a swim bladder?

A) a gas-filled organ to help with buoyancy B) sensory organ C) structure that contains helium qualities D) senses vibrations

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Which vertebrate group has a three-chambered heart?

A) Mammals B) Amphibians C) Lobe-finned fishes D) Ray-finned fishes E) Birds

Biology & Microbiology