Exam 38: Plant Developmental Responses to External and Internal Signals

A plant's growth response to mechanical stress, such as rain or contact with passing animals, is known as

The photoreceptor that absorbs blue light and triggers a phototropic response is

Write a one-sentence explanation for the role of each of the following plant hormone-like signaling molecules: methyl salicylate and jasmonic acid.

Phototropism is the directional growth of a plant caused by ____.

____ helps defend plants against viral infection.

A seedling growing toward a light source is an example of

You would like to develop an herbicide that is structurally most similar to cytokinin. Which of the following molecules would you use as starting material?

Jasmonic acid is structurally similar to prostaglandins.

Which of the following is characteristic of a plant exhibiting shade avoidance?

The twining of tendrils around a support is an example of thigmomorphogenesis.

The environmental factor that triggers shade avoidance is that plants perceive changes in the ratio of ___ to ___ light that result from the presence of nearby plants.

Cryptochrome absorbs blue light.