Which of the following is characteristic of prokaryotic genomes but not eukaryotic genomes?
A. histones
B. circular chromosomes
C. linear chromosomes
D. enclosed in a nuclear membrane
E. typically consist of a few to several chromosomes
Answer: B
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If two different species of fish fossils were found in two different layers of sedimentary rock, what might one infer about the specimens?
A. The species in lower layer died first B. They died at the same time C. The species in the higher layer evolved from the species in the lower layer D. The species in the higher layer died first E. The two species are unrelated
The cranial cavity contains
(a) the lungs and heart. (b) the spinal cord. (c) the brain. (d) both b and c.
Which of the following do I need to amplify the DNA for gene X and not for gene Y?
a. Some prior knowledge of the sequence of gene X so appropriate primers can be designed. b. a heat-stable DNA polymerase c. restriction endonucleases that cut gene X and not gene Y d. plasmid vectors that have multiple antibiotic resistance genes. e. A cDNA library and access to probes for gene X
How do corallivores keep certain corals from being overgrown? a. None of these choices
b. Moves sediment towards slow growing corals. c. Prevent larval corals to settle in certain areas. d. Feed on fast-growing, branching corals.