The last common ancestor of fungi, mammals, and archaea likely had which of the following characteristics?
A. both a plasma membrane and a circular
chromosome
B. both a circular chromosome and
membrane-bound organelles
C. both free-floating genetic material (DNA)
and a distinct nucleus
D. both membrane-bound organelles and a
circular chromosome
E. both a distinct nucleus and a plasma
membrane
A
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What encodes the toxin paramecin in Paramecia aurelia?
A. mtDNA B. cpDNA C. Nuclear DNA D. Kappa particles
Two neighboring Caribbean islands harbor iguana populations. One island (island
A) has a total iguana population of 800, while the other (island B) has a population less than half that size, numbering 250. On island A, the frequency of an allele p is estimated at 0.75, while this same allele is present at a frequency of 0.90 on island B. During a hurricane tracking across the islands, a group of about 100 iguanas get rafted from island A to island B. What effect does this have on the frequency of allele p on island B?
Classification.Use the five compounds listed below for the following questions.
A. This compound is produced from acetaldehyde when it accepts electrons and a hydrogen ion from NADH. B. This compound is utilized in alcoholic fermentation and lactate fermentation. C. This compound is produced by fast-twitch muscle fibers. D. This compound is a product of both alcoholic and lactate fermentation. E. This compound is an intermediate product of alcoholic fermentation but not lactate fermentation.
Which of the following causes mutations by creating thymine dimers?
A. nucleotide analogs B. nitrous acid C. ultraviolet light D. benzopyrene E. gamma rays