One of the important effects of ethylene is
a. the breakdown of cells.
b. cell elongation.
c. cell division in meristems.
d. activation of protein synthesis.
e. inhibition of all of these processes
A
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If an individual living in a northern climate has allergies in the late summer, it is most likely
due to
a. long-day plants. b. short-day plants. c. either short-day or long-day plants. d. There is not enough information given to determine which type of plant is involved.
Amphetamines make persons who use them feel
a. very drowsy. b. somewhat relaxed. c. sedated. d. more alert. e. delirious.
A scout troop sets out on a backpacking trip. Soon, an unexpected storm gets them drenched, and the troop leaders discover that few boys have packed warm clothes. Several scouts start shivering uncontrollably, a sign of hypothermia. The leaders call off the trip and the group heads back to their cars. This shivering response was
A. a maladaptive response that wastes energy. B. a social signal that evolved to alert adults to take action. C. an attempt to produce heat by creating friction with their clothing. D. an attempt to produce heat by burning large amounts of ATP.
Which of the following living reptiles care for their young and have a four-chambered heart, as birds do?
A. turtles B. crocodiles C. lizards D. snakes E. tuataras