Species identification is based on all of the following except:
a. DNA-DNA Hybridization.
b. 16sRNA sequencing.
c. Cell wall composition.
d. Colonial pigmentation.
D
Species identification is based on consistent, reproducible traits that are linked to specific traits that can be used to classify the organisms as related. Although pigment is a phenotypic trait, it is not sufficient to use to specifically delineate species as various genes are responsible for pig-mentation in a variety of organisms.
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The active ingredient in the popular drug Ecstasy is related to
a. heroin. b. cocaine. c. codeine. d. amphetamine. e. serotonin.
Most of the regulation of gene expression in bacteria occurs at the ________ level
Fill in the blank(s) with correct word
Bird wings and insect wings are considered to be examples of:
a. divergent evolution. b. homoplastic evolution. c. vestigial structures. d. convergent evolution. e. coevolution.
The amount of time that has passed since two species last shared a common ancestor:
a) is revealed by the degree of similarity in sections of their DNA. b) can be determined for prokaryotic species but not eukaryotes. c) cannot be determined, due to the fact that most species pass through the same embryological stages. d) cannot be determined, due to gaps in the fossil record. e) can be determined by the relative amounts of uranium-238 found in the bones of individuals from each species.