Which of the following types of ecosystems would have the lowest percentage of total net primary
productivity?
a. open ocean
b. savanna
c. swamp and march
d. temperate deciduous forests
e. tundra
E
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The body of arthropods includes
(a) a head. (b) a thorax. (c) an abdomen. (d) all of the above.
Which of the following is a difference between a purine and a pyrimidine?
a. Purines have a single ring structure. b. Pyrimidines cannot bind phosphate. c. Pyrimidines are smaller in size. d. Purines are only found in RNA.
“Genetic fingerprinting” is based on unique
a. nucleotide base pairing b. types of nucleotides c. differences in tandem repeats. d. ratios of purines to pyrimidines e. bonding patterns between nucleotides
Trees in the Arctic are predicted to move ________ in response to warming trends
Fill in the blank(s) with correct word