__________ behavior can occur without having been learned by experience. Fill in the blank(s) with the appropriate word(s)
Instinctive
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Measuring its costs and benefits in terms of energy spent and/or gained, predation :
A. is a lose-lose interaction. B. results in gain for both individuals. C. results in a gain for one individual and a loss for the other. D. results in a gain for one individual and neither a gain nor a loss for the other. E. none of these.
Which of the following correctly describes the long-term responses of populations following the fire? a. The grasses eventually declined back to their original size and the other populations graduallygrew back to their original sizes
b. The grasses eventually grew back to their original size and the other populations eventuallydeclined back to their original size. c. All populations eventually declined. d. All populations eventually increased.
Nitrate and ammonium are usable forms of nitrogen that plants absorb with their
A. roots. B. stomata. C. roots and leaves. D. leaves. E. stomata and leaves.
Spiders breathe by means of
a. Gills b. Diffusion across the soft cuticle c. An extensive system of tracheae more complex than is found in insects d. Book lungs or primitive tracheae e. Coxal glands