cDNA
a. does not contain introns.
b. is produced from mRNA.
c. production utilizes reverse transcriptase.
d. begins as a hybrid molecule with an mRNA.
e. fits all of these descriptions.
Answer: e
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Which of the following can result in instant speciation?
a. development of a physical barrier b. polyploidy c. increase in physical size d. change in environmental conditions e. the introduction of a new predator into an area
An example of mutualism is:
a. mycorrhizae and epiphytes. b. epiphytes and tapeworms. c. monarch and viceroy butterflies. d. silverfish and army ants. e. Rhizobium and legumes.
In the Hardy-Weinberg formula, what does 2pq represent?
A) frequency of the dominant allele B) frequency of heterozygotes C) frequency of the recessive allele D) frequency of the homozygous dominants
About how many gibberellins have been identified in plants?
A) one B) five C) over one hundred D) thousands