Exam 45: Plant Responses to the Environment

If a coleus plant that has become tall and spindly, what can you do to encourage it to develop lateral branches, so that it becomes bushier?

________ triggers the formation of an abscission layer in leaves and fruits.

Most scientists believe that the lateral buds nearest the top of a tree are most inhibited from sprouting because they:

Ethylene:

When auxin accumulates on the lower side of the shoot of a germinating seed, it:

Why does removing an overripe, mushy apple from a container of otherwise good apples help preserve the good apples?

Senescence in plants usually involves:

A scientist who claims to have discovered a new plant hormone must demonstrate that this compound is:

Placing a ripe apple in a bag of green bananas will cause the bananas to ripen quickly. This is because the apple:

If a poplar forest is attacked by gypsy moths, how do the trees around the infected area tend to become somewhat resistant?

Discovered in 2007, the hormones that control the timing of flowering are called:

What happens to phytochromes after several days of dark, rainy weather?

________ maintains seed dormancy, and ________ ends seed dormancy by stimulating enzymes that break down the food reserves of the seed to fuel seedling growth.

Suppose you have some seeds that refuse to germinate when placed in moist soil. What could you do to encourage the seeds to germinate?

Misting tomato plants with wintergreen tea can help prevent mosaic virus from infecting the plant. How?

An insect that twice touches a Venus fly trap hair changes a(n)________ stimulus into a(n)________ signal.

Auxin:

Elongation of cells in stems is promoted by:

Auxins are used in rooting powders to encourage the formation of well-branched roots. True or False?

What will happen to a long-day plant, such as spinach, if the dark period is interrupted by a flash of light for several days in a row during the spring?