Multiple Choice
Tim Birkhead and his colleagues were able to boost the immune systems of male zebra finches and increase their attractiveness to females by
A) enlarging their tails.
B) injecting them with hormones.
C) feeding them carotenoid pigments.
D) increasing their caloric intake.
E) injecting them with phytohemagglutinin.
Correct Answer:
Verified
Correct Answer:
Verified
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