The root apical meristem is surrounded and protected by a structure called the
a. endodermis.
b. root cap.
c. quiescent center.
d. pericycle.
e. root hairs.
B
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How are RNA hairpin turns related to termination in E. coli?
A) The turns are formed from complementary base pairing and cause separation of the RNA transcript and RNA polymerase. B) A three-base repeat signals a stop sequence, and the RNA transcript is released. C) Release factors bind to sites on the hairpin turn, causing release of the RNA transcript. D) The hairpin turn prevents more nucleoside triphosphates from entering the active site of the enzymes, effectively shutting off the process of polymerization.
When an F plasmid integrates into the host chromosome, the strain is referred to as
A. Hfr. B. F-. C. F'. D. F+.
Based on the accompanying figure, the decline in the moose population in 1996 was most likely due to a(n):
a. predictable increase in the wolf population.
b. unpredictable increase in the wolf population.
c. decrease in the intrinsic rate of increase for the moose population.
d. decline in the food supply.
e. unknown disease organism.
The pace of evolution remains constant despite sudden environmental shifts such as climate change.
Answer the following statement true (T) or false (F)