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Life, 4/e

Ricki Lewis, University of New York at Albany
Mariëlle Hoefnagels, University of Oklahoma
Douglas Gaffin, University of Oklahoma
Bruce Parker, Utah Valley State College

Plant Form and Function

Thinking Scientifically

1. If an overanxious tomato picker tears off some tomato plant stems and leaves, the plant regrows these parts in a few weeks. Which tissue type is responsible for this regrowth?

2. What plant structures are adaptations to conserve and transport water?

3. Why can phloem transport materials in all directions, while xylem can transport materials upward only?

4. How does a tree “know” when to shed its leaves?

5. Paper “fibers” actually include fibers, tracheids, and vessel elements. Describe each of these.

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