Exam 31: Plant Responses to Internal and External Signals

The application of which of the following hormones would be a logical first choice in an attempt to produce normal growth in mutant dwarf plants?

Which of the following statements is correct with regard to a "circadian rhythm" in plants?

Auxins (IAA) in plants are known to affect all of the following processes except

You are part of a desert plant research team trying to discover crops that will be productive in arid climates. You discover a plant that produces a hormone under water-deficit conditions that triggers a suite of drought responses. Most likely the hormone is

The initial response of the root cells of a tomato plant watered with seawater would be to

A botanist discovers a plant that lacks the ability to form starch grains in root cells, yet the roots still grow downward. This evidence refutes the long-standing hypothesis that

A long-day plant will flower

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

Which of the following conclusions is supported by the research of both Went and Charles and Francis Darwin on shoot responses to light?

The detector of light during de-etiolation (greening) of a tomato plant is (are)

How does indoleacetic acid affect fruit development?

What does a short-day plant require in order to flower?

Experiments on the positive phototropic response of plants indicate that

A flash of red light followed by a flash of far-red light given during the middle of the night to a short-day plant will likely

Charles and Francis Darwin discovered that

A long-day plant will flower if

Plants often use changes in day length (photoperiod) to trigger events such as dormancy and flowering. It is logical that plants have evolved this mechanism because photoperiod changes

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

Plant hormonal regulation differs from animal hormonal regulation in that