AQA 9-1 GCSE Plant transport systems

Question 1

Which of the following is a correct characteristic of phloem

Accepted Answer

the cells have sieve plates

Question 2

What do we call the evaporation of water from the leaves of a plant?

Accepted Answer

transpiration

Question 3

Which causes a decreased concentration gradient of water vapour between the leaf and air

Accepted Answer

increased humidity

Question 4

Which factor would decrease the rate of transpiration

Accepted Answer

increased humidity

Question 5

What does translocation refer to?

Accepted Answer

The movement of sugars around the plant

Question 6

Which of these factors will cause more stomata to open and therefore increased transpiration

Accepted Answer

increased light intensity

Question 7

What happens to guard cells to cause stomata to open

Accepted Answer

water enters guard cells by osmosis, they become turgid

Question 8

Which causes an increased concentration gradient of water vapour between leaf and air

Accepted Answer

increased air movement

Question 9

Where are vascular bundles in the roots situated?

Accepted Answer

along the centre

Question 10

Water vapour diffuses out of the leaf through pores called what?

Accepted Answer

stomata

Question 11

Which of the following is a correct characteristic about xylem

Accepted Answer

the cell walls are impermeable

Question 12

What diffuses in through the stomata?

Accepted Answer

carbon dioxide

Question 13

What causes transpiration?

Accepted Answer

Diffusion of water from a plant's surface, Evaporation of water from a plant's surface

Question 14

Which statement is incorrect?

Accepted Answer

there are no stomata on the upper epidermis

Question 15

What are the cells called that control the opening and closing of stomata?

Accepted Answer

guard cells

Question 16

In what conditions do the guard cells close the stomata

Accepted Answer

night

Question 17

What happens to the guard cells to cause the stomata to close?

Accepted Answer

Guard cells lose water by osmosis and become flaccid

Question 18

What transports water around the plant?

Accepted Answer

xylem

Question 19

What transports sugars around the plant?

Accepted Answer

phloem

Question 20

What could you use to measure how quickly a plant shoot takes up water?

Accepted Answer

a potometer

Questions 20