The Meselson-Stahl experiment showed that DNA:
A: replication is conservative.
B: exists as a double helix.
C: replication is dispersive.
D: is synthesized in only one direction.
E: replication is semiconservative.
Answer: E: replication is semiconservative.
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What occurs during leptotene of prophase I?
A. The homologous chromosomes recognize one another by synapsis. B. Crossing over occurs. C. The replicated chromosomes condense. D. The synaptonemal complex dissociates. E. None of the answers are correct.
The preference of female cichlid fish for brightly colored blue or red males in Lake Victoria provides an example of
____.
a. sympatric speciation b. sexual selection c. allopatric speciation d. reproductive isolation e. ecological speciation
Smegma is produced by which gland?
A. Skene's B. Tyson's C. Bartholin D. Cowper's
Glyceraldehyde 3-phosphate is an intermediate in the Calvin-Benson cycle.
Answer the following statement true (T) or false (F)