Refer to the paragraph on scarlet gilia. Late in the season, when only hawk moths were present, researchers painted the red flowers white. What would you expect?
A) Unpainted red flowers would produce more fruits than white flowers would.
B) Red flowers painted white would produce more fruits than red flowers would.
C) Red and white flowers would produce the same numbers of fruits.
B
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Suppose that a mistake made during DNA replication in a cell is not corrected, but instead the
mutation remains in the single strand where it occurred. Then suppose that after the cell divides both daughter cells survive, and those cells then go on to have DNA replication and ultimately cell division. There are now four cells where there once was one cell. Assuming that the mistake was never corrected and that no new uncorrected mistakes occurred, how many of the four cells will have the mutation in their DNA?
a. none b. one c. two d. three e. four
The digestive structure that stores concentrated bile is the
a. duodenum. b. gallbladder. c. liver. d. pancreas. e. stomach.
Which of the following is a difference between frogs and salamanders?
a. frogs have cloacas; salamanders do not b. salamander larvae are tetrapods; frog larvae are not c. salamanders have scales; frogs do not d. frogs reproduce in water; salamanders only sometimes reproduce in water e. more than one of these is a difference between frogs and salamanders
Genome screening with molecular markers is a useful model for studying the genetics of
homosexuality. Indicate whether the statement is true or false.