F3 3.4 Transport system in plants

Transpiration is

• the movement of water through a plant from the roots up the stem
• the loss of water from the leaves of a plant by the process of evaporation
• the flow of water into plant roots by osmosis from the soil
• the process of minerals and sugars moving through plant veins

The plant tissue that carries food materials DOWNWARD from the leaves to the rest of the pant is the ______.

• Phloem
• Stomata
• Chlorophyll
• Xylem

Vascular tissue that transports water and minerals UPWARDS from a plant's roots is know as ______.

• Chlorophyll
• Phloem
• Stomata
• Xylem

Why is the evaporation of water from leaves important?

• It cools leaves and helps move water up the plant.

• It makes the plant wilt

• It helps the plant to respire

• It makes the plant contract

Which of these is true?

• Xylem vessels carry water and dissolved minerals up the plant

• Phloem tissue carry water and dissolved minerals up the plant

• Xylem vessels carry dissolved sucrose up and down the plant

• Phloem tissue carry water only down the plant

What are the factors affecting the rate of transpiration in plant?

• temperature

• light intensity

• air humidity

• movement of air

• all

What happens to the transpiration rate as light intensity increases?

• It increases

• It stays the same

• It decreases

An increase in wind or temperature will ________________ transpiration

• increase
• decrease
• no change
• none

Which of the following would NOT speed up the rate of transpiration?

• High humidity

• High wind speed

• Increased temperature

• Large leaf surface area

When photosynthesis takes place during the day, stomata will...

• open

• close

• static

• hot