Exam 37: Plant Signals and Responses to the Environment

If you want all of the orange trees in your orchard to uniformly flower and set fruit, you should spray ____ on your plants.

The creosote bush exhibit ____, an adaptation that evolved as a response to their biotic environment.

The plant hormone ____ appears to play a major role in gravitropism in roots and shoots. ​

The first peptide hormone discovered in plants was ____, which functions in wound response in the tomato. ​

The most widely used herbicide in the world, 2,4-D, is a synthetic form of ____. ​

The plant hormone ____ is primarily responsible for the bending of a plant shoot toward light. ​

The plant hormone structurally similar to adenine is ____.

The plant hormone ____ is primarily responsible for the growth of a floral stalk in rosette plants such as cabbages. ​

The most widely accepted hypothesis for gravitropism proposes that plants detect gravity much the same way animals detect gravity. ​

Boiling DNA can produce ____. ​

During daylight hours, primarily ____. ​

A pea plant that is not able to make GA₁ will ____. ​

At night, assuming no artificial lights, primarily ____.

External cues such as increasing day length or warming after a cold snap stimulate gibberellin synthesis, which results in bolting in plants such as cabbages.

Bioactive specialized compounds are ____. ​

Specific cells in developing seeds and maturing fruits have receptors for ethylene, but cells in stems generally do not. ​