The components of a nucleotide are:
a. a nitrogenous base
b. a nitrogenous base and a pentose sugar
c. a nitrogenous base, a pentose sugar, and a phosphate group
d. a nucleoside and a phosphate group
e. Both c and d
Ans: e
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A female Burmese python incubating her eggs can warm them using _____
A) acclimatization B) torpor C) evaporative cooling D) nonshivering thermogenesis E) shivering thermogenesis
If a special fungicide killed all of the glomeromycetes in an environment, but did not affect other types of fungi, which of the following would most likely occur?
A. Plant nutrient uptake from the soil would be reduced. B. Overall decomposition rates would be dramatically reduced. C. Mushrooms would be absent from the environment. D. Lichens would be absent from the environment. E. Aquatic habitats would completely lack fungi.
Why was another nucleotide not added to the smallest fragment?
A) DNA polymerase became inactive after adding the last nucleotide. B) The last nucleotide added does not have a 3? hydroxyl group. C) The last nucleotide added does not have a 5? phosphate group. D) The DNA strand reached a length where it cannot grow any longer. E) DNA polymerase reached the end of the template.
The structures labeled "B" in the figure are
a. zygospores. b. haploid spores. c. ascospores. d. gametes. e. zygotes.