What happens during translation?
a. copies of DNA molecules are made
b. The cell uses a mRNA code to make proteins
c. Messenger RNA is made from a DNA code
d. tRNA is made from a mRNA code
Ans: b. The cell uses a mRNA code to make proteins
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The process by which successful traits become more common in subsequent generations is called ____
a. speciation b. mutation c. natural selection d. genetic drift
e. gene flowDue to a rapid change in the environment, a population of ants was reduced from one million to one thousand. What
type of genetic drift will occur in the gene pool of this population when it expands again? a. gene flow b. migration c. natural selection d. the founder effect e. a genetic bottleneck
Which is an example of a clumped distribution of a population?
A. Antelope travel in herds. B. Multiple species join each other at the waterhole to drink. C. Two male hummingbirds have a confrontation on the border between their territories. D. A tree species releases a poison to defend the soil around its roots, resulting in trees spaced evenly like a grid.
Which three classes of macromolecules are encoded by mtDNA?
A) transfer RNA, ribosomal RNA, and nuclear RNA B) photosystem I, photosystem II, and tRNA C) carbohydrates, enzymes, and proteins D) proteins, transfer RNAs, and ribosomal RNA E) lipids, carbohydrates, and nucleic acids