Marjorie Weber and Anurag Agrawal of Cornell University hypothesized that parts of a plant do not play a direct role in reproduction but act as a "protection racket." What is "protection racket"?
A. the plant's ability to swat off predators
B. the plant's ability to attract insects to feed from the nectar and protect the plant at the same time
C. the plant's ability to attract insects that could potentially harm it
D. the insect's ability to evade the plant's defenses
E. the insect's ability to accidently fertilize the plant while feeding on the nectar
B. the plant's ability to attract insects to feed from the nectar and protect the plant at the same time
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Distinguish between diurnal, nocturnal, and crepuscular animals, and provide an example of each. What will be an ideal response?
Two true-breeding stocks of pea plants are crossed. One parent has red, axial flowers and the other has white, terminal flowers; all F1 individuals have red, axial flowers. If 1,000 F2 offspring resulted from the cross, approximately how many of them would you expect to have red, terminal flowers?
A) 65 B) 190 C) 250 D) 565 E) 750
Which of the following accurately describes a reason why fats store more energy than carbohydrates?
Why do some leaves change color (red, yellow, orange, etc.) in the fall?
A. When leaves die, the chlorophyll molecules are no longer visible. B. Cold weather denatures the chlorophyll molecule, and it begins to reflect different colors. C. The chlorophyll molecule breaks down and other pigments now become visible. D. The chlorophyll molecule is modified to absorb different wavelengths of light.