Consider a community composed of grasses, prairie dogs, mice, bison and coyotes. Which of these organisms would be found at the bottom level of the trophic pyramid for this community?
A. coyotes
B. bison
C. prairie dogs
D. mice
E. grasses
E
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The carbohydrate(s) found in nucleic acids is/are
A. ribose. B. glucose. C. galactose. D. deoxyribose. E. ribose AND deoxyribose.
A random alteration in the sequence of DNA nucleotides that provides a new variant allele is known as a
A. disruption. B. gene mutation. C. polymorphism. D. gene frequency.
Who demonstrated that DNA is the genetic material of the T2 phage?
A: Watson and Crick B: Meselson and Stahl C: Hershey and Chase D: Franklin E: Darwin and Wallace
Which of the following matches the organisms described with the correct domain?
a. bacteria--unicellular, eukaryotic organisms that always lack cell walls b. archaea--multicellular, eukaryotic organisms that do not have cell walls c. bacteria--unicellular, eukaryotic organisms with cell walls that do not contain peptidoglycan d. eukarya--single-celled and multicellular organisms, with a defined nucleus and a variety of nutritional sources