There are no discernible phenotypic effects for an individual with the genotype XYY
A. true
B. false
A
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Which of the following are not events in which genetic drift plays a key role?
A. migration B. bottleneck effect C. founder event D. All of the answer options are correct.
Population growth will most likely continue at its current rate for at least 60 years because ________
a. the Earth is nowhere near its carrying capacity b. more than one-third of the world's population is in the pre-reproductive base c. the world's baby boomers (those born between 1946 and 1960) will continue to have children d. any reduction in birth rate will be offset by declines in death rates as medical advances reach the less-developed countries
Which excretory organs are found in insects?
A. nephridia B. protonephridia C. Malpighian tubules D. nephron
Which of the following is found only in some bacteria?
A. Cell membrane B. Slime layer C. Cytoskeleton D. Flagella