A highly branched secondary structure is formed during:
A. attachment of a 5' cap to mRNA.
B. attachment of poly(A) tails to mRNA.
C. splicing of all classes of introns.
D. splicing of group I and II introns.
D
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The fossil record is a testament to extinct fauna no longer present on Earth. Certain areas of the planet have always had high species diversity (evidence from fossils and catalogs of current species diversity)
What two processes likely contribute to the patterns of animal diversity we see through time? A. evolutionary innovation and the appearance of new land masses over time B. evolutionary innovation and changes in atmospheric oxygen C. evolutionary innovation and extinction events (both local and global) D. evolutionary innovation and volcanic eruptions
How do turtles differ from other reptiles?
a. they are mostly predators b. they do not have internal fertilization c. they give birth to live young d. they do not have teeth e. they must live part of their live in water
According to the intermediate disturbance
hypothesis, a. species richness becomes greatest in between disturbances of moderate intensity or frequency. b. a disturbance is necessary during succession in order to stabilize the community. c. community succession is highly predictable. d. competition and other species interactions are the most important factors in shaping community structure. e. a community reverts to a climax state after a disturbance.
Which of the following WBCs are NOT lymphocytes?
A) cytotoxic T cells B) helper T cells C) NK cells D) M cells E) B cells