Which of the following sequences could be cut by a restriction enzyme?
A. ACAAGA
B. AATTACC
C. CATTAC
D. ACTACT
Answer: C. CATTAC
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The diapsids diverged into the lepidosaurs and the archosaurs. From which of these groups did the snakes arise?
a. archosaurs b. neither of these groups c. lepidosaurs d. There are species of snakes from both of these groups.
Individuals who are heterozygous for sicklecell
anemia have a greater resistance to
a. malaria. b. diphtheria. c. cholera. d. typhoid fever. e. all of these
Pioneer plant species are usually characterized
by a. small size. b. high dispersal rates. c. slow maturation. d. high dispersal rates and high numbers of offspring e. small size, efficient dispersal mechanisms, and slow maturation.
In which type of regulation do hormones act on the cells that produce it?
a. classical endocrine signaling b. neuroendocrine signaling c. paracrine signaling d. autocrine signaling e. pheromone signaling