Which of these humans is the "fittest" as far as natural selection is concerned?
A) a person who lives to the age of 105 and has two children
B) a very popular film star who is still alive, is very rich, and has three children from three spouses
C) a person who lives to the age of 110 and has no children
D) a person with seven children who is killed in an automobile accident at age 40
Answer: D
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Life probably would never have emerged on Earth if
the ancient atmosphere had been the same as the present one in regard to a. carbon dioxide. b. hydrogen. c. oxygen. d. nitrogen. e. carbon monoxide.
Dormancy can be triggered by
a. low Pfr levels. b. the production of abscisic acid. c. nitrogen deficiency and low soil moisture. d. cold nights. e. all of these.
Which technique amplifies small samples of DNA to quantities that are large enough for analysis?
A. hybridization B. PCR C. RFLP D. DNA fingerprinting
What posttranslational modification occurs on the protein CPEB to initiate mRNA translation?
A) ubiquitination B) glycosylation C) methylation D) acetylation E) phosphorylation