Which is NOT a correct characterization of tundra?
Select one:
a. All precipitation in the tundra remains permanently frozen, hence the name "permafrost."
b. The landscape of pools and mires in the tundra is due to melted snow that does not evaporate.
c. The long periods of darkness, sometimes even six months of night, prevents trees and other photosynthetic producers from growing.
d. In the summer, the tundra is alive with insects and birds.
e. Most animals found in the tundra live there year round.
e. Most animals found in the tundra live there year round.
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Which of the following is not normally a component of a ribonucleotide?
A. a phosphate group B. a ribose C. uracil D. thymine E. adenine
Which of the following blotting techniques allows a researcher to determine the number of copies of a gene within the genome of an organism?
A. Western blotting B. colony hybridization C. Northern blotting D. Southern blotting E. Eastern blotting
RNA polymerase binds to the
A. promoter sequence. B. start codon. C. termination sequence. D. regulation sequence.
In the case of the cichlid fish in Lake Victoria, ____ was the driving force of speciation
a. artificial selection b. fixed alleles c. inbreeding d. sexual selection e. genetic drift