37. Plant Sensation and Response

Which hormone would a florist most likely spray on cut flowers to keep them fresh?

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

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

Increasing the proportion of unsaturated fatty acids in their membranes is a response of plants to __________.

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

Which of these features is/are characteristic of ethylene?

Increasing the cytoplasmic levels of specific well-tolerated solutes, such as sugars, helps a plant to cope with __________.

The abscission layer __________.

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

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

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