The production of organic solutes by plants 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 __________.

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.)