Exam 31: Plant Responses to Internal and External Signals

If you were shipping green bananas to a supermarket thousands of miles away, which of the following chemicals would you want to eliminate from the plants' environment?

The apical bud of a shoot produces ________, resulting in the inhibition of lateral bud growth.

A plant mutant that showed normal gravitropic bending but did not store starch in its plastids would require a reevaluation of the role of ________ in gravitropism.

Which of the following best explains both the growth of a vine up the trunk of a tree and the directional growth of a houseplant toward a window?

A botanist exposed two groups of the same plant species to two photoperiods, one with 14 hours of light and 10 hours of dark and the other with 10 hours of light and 14 hours of dark. Under the first set of conditions, the plants flowered, but they failed to flower under the second set of conditions. Which of the following conclusions is consistent with these results?

Which of the following plant responses is primarily due to the action of gibberellins?

Seed packets give a recommended planting depth for the enclosed seeds. The most likely reason some seeds are to be covered with only ¼ inch of soil is that the

In extremely cold regions, woody species may survive freezing temperatures by

A short-day plant exposed to nights longer than the minimum for flowering but interrupted by short flashes of light

A plant will recognize a pathogenic invader

The rapid leaf movements resulting from a response to touch (thigmotropism) primarily involve

Which of the following is the most likely plant response to an attack by herbivores?

Why do coleoptiles grow toward light?

After some time, the tip of a plant that has been forced into a horizontal position grows upward. This phenomenon is related to

When plants exhibit generalized defense responses in organs distant from the infection site, this is termed

Charles and Francis Darwin discovered that

A short-day plant will flower only when

Which of the following hormones would be most useful in promoting the rooting of plant cuttings?

Plant hormonal regulation differs from animal hormonal regulation in that

Why are axillary buds often inhibited from growing even though a stem may be actively elongating?