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Flashcards in Plants transport Deck (20):
0

What do plants use light energy to do?

To photosynthesise; convert carbon dioxide and water into glucose and oxygen.

1

What substance is vitally important for all plants?

Water

2

What must plants have to allow water to move from where it is absorbed to where it is needed?

A transport system

3

What vessel does the water move up through plants in?

Xylem

4

What substance is the xylem strengthened by?

Lignin- spirals or curls around it

5

What is the function of a guard cell?

It controls wether the stomata are opened or closed

6

Why do leaves have a large surface area?

To absorb light

7

What are stomata?

Stomata are pores found on the surfaces of leaves

8

What do the stomata do?

They allow gases to move into and out of the leaf and also allows water vapour to leave the plant by evaporation

9

What happens to the guard cells when a plant has a little water?

The guard cells become plasmolysed and the stomata close this conserves the water

10

What happens to the guard cells if the plant has a good supply of water?

The guard cells become turgid and the stomata open

11

Why are most of the stomata found on the lower surface of the leaf?

Because the stomata are protected from wind and sunlight so they don't loose as much water

12

What is transpiration?

Transpiration is the diffusion of water vapour from the leaf into the air

13

Why do root hair cells have extensions that project into the soil?

Because it increases the surface area to allow more absorption to take place.

14

What is sugar transported by in a plant?

Sugar is transported by tubes called phloem

15

Are phloem living?

Yes they are alive

16

Are xylem living?

No they are dead

17

Does water travel up or down a plant?

Travels up

18

Does glucose travel up or down a plant?

It travels both up and down

20

What is the rate of transpiration affected by?

Temperature
Wind speed
Humidity
Light intensity