Which of the following statements is true regarding Seehausen and van Alphen's African cichlid experiment?
A. Males show sexual selection based on males' size and coloration.
B. Females show sexual selection based on males' coloration.
C. Mate selection is random and is not based on sexual selection.
D. Females show sexual selection based on males' size and coloration.
Answer: B
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In bacterial cells, a cell that had the F plasmid integrated into the chromosome is known as
A) F-. B) F+. C) F'. D) Hfr. E) none of the above
Which type of plant signaling molecule is similar in structure to aspirin?
a. abscisic acid b. ethylene c. salicylic acid d. jasmonate e. oligosaccharin
Nonhomologous end joining is used to
A) correct base mismatches in newly synthesized DNA. B) fix double-strand DNA breaks. C) avoid deletion or insertion of bases. D) remove modified or depurinated bases. E) avoid deletion or insertion of bases and remove modified or depurinated bases.
________ pairs up with troponin proteins to form a complex that blocks muscle contractions
Fill in the blank(s) with correct word