Chapter 8 Quiz 1

What is the function of the cuticle?

• To prevent carbon dioxide from entering the leaf

• To act as a barrier to disease organisms

• To waterproof the leaf

• To give the leaf a green colour

What is the main region where photosynthesis occurs?

• Palisade mesophyll cells

• Xylem

• Spongy mesophyll cells

• Stomata

The vascular bundles acts like the circulatory system does in humans.

• True

• False

The 'sink' of a plant refers to what

• Where waste products are excreted

• Where nutrients are stored

• Where it washes its hands

• Where food is made

The walls of xylem vessels are strengthened with

• Chlorophyll

• Chitin

• Starch

• Lignin

What is transpiration?

• The loss of water vapour through sweating

• The loss of water vapour through the cuticle

• The loss of water vapour through the stomata

• The gain of water vapour through the stomata

Which of the following does not affect the rate of transpiration?

• The air movement

• The temperature

• The light intensity

• The size of the plant

Light intensity directly influences the rate of transpiration

• True

• False

Decreased air movement will

• decrease the rate of transpiration

• not affect the rate of transpiration

• increase the rate of transpiration

• allow the plant to stand up straight

The stomata prevent wilting during a period of water stress

• True

• False