In eukaryotes, each type of RNA polymerase recognizes a different
A. start codon
B. stop codon
C. promoter
D. transcription factor
E. release factor
Answer: C
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The skin gills of sea stars are structures
(a) for the exchange of gases and excretion of ammonia. (b) of defense. (c) for movement. (d) that produce the skeletal elements.
Imagine that you have the "stomach" flu. As you rush to the bathroom, describe the sequence of events and structures involved. ext Section: LO4 Key Concept: digestive tract Level: Application of concepts
What will be an ideal response?
Which of the following lacks sufficient penetrating power for bulk sterilization?
A. Gamma radiation B. Ultraviolet (UV) radiation at 260 nm C. Alpha and beta particles D. X rays
Blood in arteries
a. always travels away from the heart. b. travels away from the heart only if it is oxygen rich. c. always travels toward the heart. d. travels from the lungs. e. is always oxygen rich.