The average time to death from starvation in a fruit fly is about 20 hours. Selecting for increased starvation resistance in fruit flies:
a) can produce populations in which the average time to death from starvation is 10 hours.
b) has no effect because it is too complex a physiological process, dependent upon the effects of too many genes.
c) can produce populations in which the average time to death from starvation is 160 hours.
d) has little effect because constant mutation reduces starvation resistance, counteracting any benefits from selection.
e) has no effect because it is a not a trait that influences fruit fly fitness.
Ans: c) can produce populations in which the average time to death from starvation is 160 hours.
You might also like to view...
For ions with a charge of one, which of the following is equal to one milliequivalent?
a. 0.5 millimole b. 2 millimole c. one millimole d. 0.1 millimole
Vectors usually contain genetic (markers/sequences/probes) such as antibiotic genes or fluorescent tags
What will be an ideal response?
Which of the following elements correctly pairs an essential element in plants with its function?
A) nitrogen â€" component of nucleic acids, proteins, hormones, coenzymes B) magnesium â€" component of nucleic acids, phospholipids, ATP, several coenzymes C) phosphorus â€" cofactor functioning in protein synthesis D) potassium â€" component of chlorophyll; activates many enzymes E) sulfur â€" component of DNA; activates some enzymes
The mammalian circadian pacemaker is located in the
A. hippocampus. B. somatosensory cortex. C. adrenal gland. D. brainstem. E. suprachiasmatic nucleus.