Exchange system in plants

Question 1

How does Carbon dioxide enter the leaves?

Answer 1

This enters the leaves through diffusion

Question 2

How is water and ions taken into plants?

Answer 2

This is through the use of active transport absorbing ions and water from the soil

Question 3

How is the root specialised for active transport ?

Answer 3

The Surface area of the root is increased by the root hairs.

Question 4

How is the surface area of a leaf increased?

Answer 4

This is increased by the flattened shape and internal air spaces

Question 5

What do plants use to obtain carbon dioxide from atmosphere and release oxygen ?

Answer 5

Plants use stomata to obtain carbon dioxide for photosynthesis and remove oxygen from photosynthesis

Question 6

How is water mainly lost from a plant ?

Answer 6

This is through the stomata

Question 7

When does evaporation mainly happen ?

Answer 7

This is more rapid in hot, windy or dry conditions

Question 8

What happens when plants lose water faster than it is replaced by roots.

Answer 8

The stomata closes stopping water being lost from gas exchange.

Question 9

What is the size of the stomata controlled by

Answer 9

This is by the guard cells