DNA contains all of the following nitrogen-containing bases EXCEPT ____
a. adenine
b. uracil
c. guanine
d. adenine
e. thymine
ANSWER: b
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A researcher has mapped the entire genome of an insect. When scanning the sequences she notices highly repetitive sequences, which contain tandem arrays of short sequences. She is most likely looking at which region of the chromosome?
A. centromere B. telomere C. chromatid D. spindle fiber E. centriole
A hectare of wheat fixes 32,000 kg of carbon per year through photosynthesis and uses 7,000 kg of carbon per year for cellular respiration. The net primary productivity of the wheat field is therefore _____ kg of carbon/hectare/year.
Fill in the blank(s) with the appropriate word(s).
In ____, genes at one locus mask the effect of genes at another locus
a. incomplete dominance b. codominance c. epistasis d. polygenic inheritance e. pleiotropy
Vascular plant bodies typically consist of a(n) ____ shoot system and a ____ root system
a. photosynthetic; photosynthetic b. nonphotosynthetic; photosynthetic c. photosynthetic; nonphotosynthetic d. nonphotosynthetic; nonphotosynthetic e. autotrophic; heterotrophic