Exam 46: Plant Responses to the Environment

The ideal Christmas tree has a conical shape. The top of the tree is pointed and narrow, with clear apical dominance, and the bottom of the tree is wide, with extensive lateral branching. Certain evergreen species are suitable for use as Christmas trees because they have this shape normally and thus require little pruning or training as they grow. For example, spruces and firs are often grown as Christmas trees, whereas yews and longleaf pines are not. Based on this information, spruces and firs are likely to have

In seeds from northern areas, what plant hormone often needs to be removed to get them to germinate, and how can it be removed?

The phytochrome Pr

Short- day plants flower only if

A plant's tendency to grow toward a source of light is called

Gravitropism is a plant's

How is the carnivorous plant lifestyle suited for an existence in bogs?

If you want to keep cut flowers fresh, treat them with

If a storm breaks off the top of a tree, within a year or two, one of the lower branches will grow upward and become the new tree top, while inhibiting other branches from doing the same. This is an example of

What kinds of hormonal changes occur as trees prepare for winter dormancy?

Elongation of cells in stems is promoted by

Which of these hormones causes cell elongation, promotes apical dominance, and stimulates root branching?

Plants that flower in the United States only in the early spring (when nights are long) are _ _ plants.

Radish plants under insect attack

Some plants under attack by insects can communicate this information to other parts of the same plant and to nearby plants via

At night, when little red light is available to the plants in an area, what occurs?

Which pigment is responsible for the phototropism responses of plants?

Which of the following is TRUE of the relationship between the phytochrome system and the biological clock of plants?

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

Roots grow downward and shoots grow upward due to