Some restriction endonucleases cut DNA in such a way that short, single stranded regions known as ____ ends are
created.
a. hydrogen-bonding
b. sticky
c. tacky
d. blunt
e. jagged
ANSWER: b
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Chromosomal aberrations:
A. are caused by errors during meiosis. B. are typically only seen in the elderly. C. are usually fixed by DNA polymerase. D. can be caused by methylation. E. are not described by any of the answer
What mechanism makes it difficult to classify bacteria into distinct species groups?
A. vertical evolution. B. horizontal gene transfer. C. sexual reproduction. D. asexual reproduction. E. low mutation rates.
Almost all chromosomally abnormal embryos and fetuses are ____________________ as pregnancy progressesFill in the blank(s) with the appropriate word(s)
Why do the benefits of group living focus on foraging and predation?
a. Reproduction is irrelevant for the fitness of individuals in a group. b. Individuals in groups always forage and are vigilant together. c. Groups only exist for foraging and anti-predator behavior. d. Most of an organism's time is spent foraging and avoiding predators.