What do all organisms have in common?
a. they use DNA and RNA to pass on information
b. they are all prokaryotes
c. they are all eukaryotes
d. they are genetically identical
Ans: a. they use DNA and RNA to pass on information
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By what mechanism did allele frequencies change due to the asteroid?
A) Allele frequencies did not change because of the asteroid. B) The asteroid caused mutations in the fish population. C) The asteroid changed the environment, so fish with allele S2 had increased fitness. D) The asteroid killed fish because of their location, so the allele frequency changed by chance.
When plasmids are used to produce a desired protein, the ________
A) plasmids multiply and produce the protein outside of the bacterium B) bacterial chromosome is genetically engineered, and the plasmid is used to help the bacterium replicate C) desired gene is inserted into the plasmid, and the plasmid is taken up by the bacterium D) bacterial genome and plasmid are inserted into the genome of the cell containing the desired gene
Most insects would be typical of which survivorship curve category?
A) late-loss species B) constant-loss species C) early-gain species D) early-loss species E) late-gain species
Repressible operons are normally turned on in the cell.
Answer the following statement true (T) or false (F)