7th Grade Science Student ebook

UNIT 5 STRUCTURE AND FUNCTION IN LIVING THINGS

Figure 14.17: Use this picture to

answer question 8b.

For each situation below, tell

whether water would move into the

roots or out of the roots. Explain

your reasoning for each answer.

1. Water is added to the soil of a
   potted plant that was dry.


2. Salt water is added to a potted
   plant.

14.2 Section Review

1. Describe the major function of each region of a plant:
   a. roots
   b. stems
   c. leaves


2. What are the two major systems in a plant?


3. Explain the function of each vascular tissue:
   a. xylem
   b. phloem


4. What are root hairs? What is their function?


5. How are vascular tissues arranged in a monocot stem? A dicot
   stem?


6. Name the function of each leaf structure:
   a. stomata
   b. upper epidermis
   c. palisade layer
   d. spongy layer
   e. cuticle
   f. guard cells


7. Explain how transpiration pulls water throughout a plant.


8. Describe how a plant might respond to each situation:
   a. A potted plant is place in a window and receives light from
   only one direction.
   b. A plant is held in the position shown in Figure 14.17.