AQA 9-1 GCSE Plant transport systems

Question 1

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

Accepted Answer

a potometer

Question 2

What transports sugars around the plant?

Accepted Answer

phloem

Question 3

What happens to guard cells to cause stomata to open

Accepted Answer

water enters guard cells by osmosis, they become turgid

Question 4

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

Accepted Answer

stomata

Question 5

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

Accepted Answer

increased light intensity

Question 6

What happens to the rate of transpiration as the light intensity increases?

Accepted Answer

decreases, increases then remains constant

Question 7

What causes transpiration?

Accepted Answer

Evaporation of water from a plant's surface

Question 8

Which of the following is NOT a correct difference between transpiration and translocation

Accepted Answer

Transpiration requires energy, translocation is passive

Question 9

Which factor would decrease the rate of transpiration

Accepted Answer

increased humidity

Question 10

Where are vascular bundles in the roots positioned?

Accepted Answer

along the centre

Question 11

What transports water around the plant?

Accepted Answer

xylem

Question 12

What are aphids used for?

Accepted Answer

to measure rate of sugar transport through plant

Question 13

What happens to the rate of transpiration as humidity increases?

Accepted Answer

decreases

Question 14

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

Accepted Answer

transpiration

Question 15

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

Accepted Answer

Guard cells lose water by osmosis and become flaccid

Question 16

Which of the following is a correct characteristic of phloem

Accepted Answer

molecules can move in two directions

Question 17

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

Accepted Answer

guard cells

Question 18

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

Accepted Answer

increased wind

Question 19

Which of the following is a correct characteristic about xylem

Accepted Answer

the cells are dead

Question 20

What does translocation refer to?

Accepted Answer

The movement of sugars around the plant

Questions 20