About ________ percent of human genes are alternately spliced.
A) 10
B) 40
C) 75
D) 90
D) 90
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Each of the major hypotheses proposed to explain why sexual reproduction is more widespread than asexual reproduction ultimately base their explanations on the adaptive benefit of (select all correct choices):
A. forming pair bonds. B. forming genetically distinct offspring. C. forming large populations. D. forming relatively slow-growing populations. E. reducing mutation rates.
What are the contributions of Beadle, Tatum, Watson, and Crick to biology? What techniques did they
use to revolutionize biological science?
What will be an ideal response?Poliovirus initially multiplies in the ________.
A. nasopharynx B. intestine C. central nervous system D. lymphoid tissue E. basal ganglia
Africa, Asia, South America, and Antarctica share some patterns of primitive (fossil) plants and early reptiles, but do not have similar mammal populations. These findings
A. suggest that a pattern of land bridges existed at different times in geological history. B. suggest that the mammals evolved earlier while continents were joined, but plants and reptiles radiated into diverse groups after separation. C. cast serious doubts upon the theory of continental drift and fused land masses. D. are an unsolved puzzle probably due to the random nature of biological evolution. E. suggest that the earlier plants and reptiles evolved while continents were joined, but mammals radiated into diverse groups after separation.