Exam 37: Plant Signals and Responses to the Environment

Trimming a shrub will make it become more bushy (have more lateral growth) primarily due to a reduction in the amount of ____.

In monoecious species of plants, plants that have separate "male" and "female" flowers both on the same plant, applications of gibberellin ____.

The main stimulus for phototropism is light of ____ wavelengths.

Bioactive specialized compounds that function to protect plants from viral, fungal and bacterial pathogens are ____.

Tropisms explain how plants can move from place to place.

Plants exude ____ from roots to stimulate the growth of soil fungi.

Chitinases are examples of ____.

Researchers have used molecular analysis to determine that ____ evolved after flowering plants, but before eudicots and monocots emerged.

Chaperone-type proteins that stabilize other proteins in response to environmental stresses such as salinity, drought, heat, and cold are ____.

The plant hormone ____ has been shown to both promote pollen tube elongation and inhibit root elongation.

Leaf aging is retarded by ____.

The type of plant hormone primarily responsible for inhibiting leaf abscission is/are ____.

The growth-promoting substance that promotes stem elongation and bending toward light is produced primarily in ____.

The plant hormone ____ causes chloroplasts to mature.

The synthesis of ____ is triggered when cells bind systemin.

If you want to prevent a grass seedling shoot from bending toward light, you should ____.

Movement of IAA in a shoot tip is as follows:

After a plant has survived a microbial invasion, the rest of the plant is often less vulnerable to future infections. This is called ____.