Exam 39: Sensory Systems in Plants

________ are chemical substances produced in small quantities in one part of an organism and then transported to another part of the organism,where they bring about physiological responses.

How do heat shock proteins protect plants from high temperatures?

When seeds are removed from strawberries,fruit growth is stopped.This suggests the seeds contain which of the following hormones?

A compound similar to auxin,2,4,5-trichlorophenoxyacetic acid (2,4,5-T),has been used

Several scientists,including Charles and Francis Darwin,Frits Went and others,demonstrated that auxins caused stems to bend toward light in a series of elaborate experiments.Went was the researcher who finally determined that bending of the stem toward light was a result of which mechanism?

Which cell structure is most likely responsible for sensing gravity?

Coconut milk was an extremely useful additive in plant tissue culture because,in addition to amino acids,it contains

The acid growth hypothesis links

Directional,light-triggered plant development is known as

Red light and phytochrome are involved in which of the following plant growth responses? Check all that apply.

In Arabidopsis plants,about 7% of its genome is devoted to processes tied to which molecule?

Which of the following are true statements about gibberellins? Check all that apply.

The directional growth response of plants to touch is called

The plant hormones known as ________ may have an evolutionary origin in the common ancestor to both plants and animals.

Mature plants may become ________ in dry or cold seasons in order to survive long periods that are unfavorable for growth.

Abscisic acid synthesized in the root travels to different parts of the shoot where it regulates transpirational water loss.What is the most likely way that ABA travels from the root to the various locations within the shoot?

While flipping through an agriculture products catalog,you come across the following advertisement,"The Centralized Ripening System-makes large scale hormone distribution even easier!".What hormone does this product distribute?

The elongation of stems is stimulated by

Abscisic acid (ABA)is synthesized in the roots in response to decreased soil water potential.ABA then translocates to the leaves,where it rapidly alters the osmotic potential of guard cells.What effect would this have on the stomata and the process of transpiration?

A scientist is investigating a hormone response in rose bush stems by removing the apical meristems of the main stems.What is the most likely result of this experiment and what hormone is responsible?