Chapter 4.5

Question 1

What type of root (usually found in dicots) penetrates the soil with little branching?

Answer 1

Taproot

Question 2

What are the long, finger-like projections that increase the water-absorbing surface area of the roots?

Answer 2

Root hairs

Question 3

What is the food-storage region of the root?

Answer 3

Root cortex

Question 4

What part of the root is where cells increase in length?

Answer 4

Region of elongation

Question 5

What cone-shaped covering provides protection for the tender root tip?

Answer 5

Root cap

Question 6

What is the process of mixing molecules of one substance through another by random molecular motion?

Answer 6

Diffusion

Question 7

What is one-way diffusion through a semi-permeable membrane?

Answer 7

Osmosis

Question 8

What are the three factors that affect the flow of the sap stream?

Answer 8

Root pressure
Capillarity
Transpiration pull

Question 9

Why does high salt content in soil kill plants?

Answer 9

Because salt pulls the water out of the roots through osmosis.