McGraw-Hill Online Learning Center Test

McGraw-Hill Online Learning Center Test


1. Review the image and answer the following questions.

What is the primary route of mineral absorption by roots?

A. cortex of the root
B. root hairs
C. epidermis of the root
D. Casparian strips


2. What is the function of the Casparian strip in a plant root?

A. This strip of cells functions to keep mycorrhizae from entering the root past the cortex.
B. These cells regulate the force of transpiration.
C. These cells control the flow of water and ions between the cortex and the xylem.
D. All of these are correct.
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