The situation as described in the paragraph above should select most directly against males that
A) are unable to distinguish food items that are red from those of other colors.
B) are older, but still healthy.
C) are capable of defending only moderately sized territories.
D) have slightly lower levels of testosterone during breeding season than have other males.
E) have no prior experience courting female house finches.
Answer: A) are unable to distinguish food items that are red from those of other colors.
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Apoptosis is a form of
A) programmed cell death that is a normal part of development. B) programmed cell division that is a normal part of development. C) cellular duplication. D) cellular adhesion.
Which process refers to dramatic phenotypic changes that sometimes occur in evolution, such as the appearance of
feathered wings during the evolution of birds? a. gradualism b. allopolyploidy c. macroevolution d. paedomorphosis e. microevolution
Fruits often ripen faster when placed in closed paper bags because of the effect of
(A) cytokinin (B) abscisic acid (C) CO2 (D) gibberellin (E) ethylene
Birds are feathered reptiles
Indicate whether the statement is true or false