37. Plant Sensation and Response

Which of the following describes a plant's response to heat stress?

Seeds of many desert plants will not germinate until a heavy rain washes away their __________.

The triple response to mechanical stress results in __________.

The abscission layer __________.

In the autumn, the amount of __________ decreases, rendering the cells of the abscission layer more sensitive to __________.

The synthesis and release of abscisic acid in a plant is a response to __________.

Which of these features is/are characteristic of ethylene?

__________ appear to allow a plant cell to sense its orientation with respect to gravity.

A rapid loss of water in specialized cells in the sensitive plant Mimosa pudica causes __________.

The formation of air tubes in submerged roots is an adaptation to __________.

The production of organic solutes by plants is a response to __________.

When a plant that is not adapted to salty water is exposed to salty water, it will __________.

Test your knowledge of the five major classes of plant hormones (auxins, cytokinins, gibberellins, abscisic acid, ethylene) by matching one hormone to each lettered box. (Note that some hormones will match up to more than one box.)