Transport system- plants

Question 1

What are the plants organs?

Answer 1

roots, stem, leaves

Question 2

What materials need to be transported up the plant?

Answer 2

water and minerals

Question 3

what process that occurs in leaves is water required for?

Answer 3

Photosynthesis

Question 4

What is the function of the upper and lower epidermis?

Answer 4

Protects leaf

Question 5

What is the function of the palisade mesophyll?

Answer 5

Photosynthesis occurs here

Question 6

What is the function of the spongy mesophyll cells?

Answer 6

Where photosynthesis occurs

Question 7

What is the function of the guard cells?

Answer 7

Controls opening and closing of stomata

Question 8

What is the function of the xylem?

Answer 8

Transports water and minerals up plant from root to stem and leaf

Question 9

What is the function of phloem?

Answer 9

Transports sugar up and down plants

Question 10

What is the function of stomata?

Answer 10

Gas exchange between leaf and air occurs here. Water vapour is lost through stomata

Question 11

What is the function of a vein in plants?

Answer 11

Consists of xylem and phloem tissue

Question 12

Why does glucose need to be transported down to root cells?

Answer 12

Root cells have no chlorophyll and cannot make glucose. All parts of the plant need glucose for respiration

Question 13

What is the function of the rings of lignin?

Answer 13

Helps xylem tubes withstand pressure changes as water moves up the tubes

Question 14

What is xylem made of?

Answer 14

Hollow tubes made of dead cells

Question 15

What is phloem made of?

Answer 15

living tissue- has sieve tubes, sieve plates, strands of cytoplamsm, companion cells

Question 16

What is transpiration?

Answer 16

The loss of water from leaves

Question 17

How is the root hair cell adapted to it function of absorbing water?

Answer 17

The cell has a larger surface area for greater water absorption

Question 18

What environmental conditions could affect the rate of transpiration?

Answer 18

Temperature, wind speed, humidity, surface area(of leaf)

Question 19

How does a decrease in temperature affect the rate of transpiration?

Answer 19

Decreases

Question 20

How does an increase in wind speed affect rate of transpiration

Answer 20

Increases

Question 21

How does a decrease in humidity affect rate of transpiration?

Answer 21

Increases

Question 22

How odes an increase in surface are affect rate of transpiration?

Answer 22

Increases

Question 23

What is a potometer used for?

Answer 23

Measure the rate of transpiration

Question 24

To measure transpiration what is the reason for a tightly fitting rubber tube to be used?

Answer 24

To prevent leakage

Question 25

To measure transpiration why is time allowed for plant to settle in the environmental conditions?

Answer 25

To ensure rate of movement of coloured water is only being caused by the factor being investigated

Question 26

To measure transpiration why do u repeat measurement of rate of movement of bubble?

Answer 26

For more reliable results

Question 27

To measure transpiration why are all factors except one kept the same?

Answer 27

To ensure onlt one variable is changed to improve validity of the investigation

Question 28

How do u measure the rate of transpiration?

Answer 28

Using a potometer

Question 29

Where do water an minerals enter the plant?

Answer 29

Root hairs

Question 30

suggest an advanatge to having fewer stomata

Answer 30

plants will not require as much water

Question 32

Describe the structures and processes involved as water moves through the plant from the root to the soil to the air

Answer 32

Water is absorbed by the root hairs by osmosis
Water travels upwards in the xylem
Water travels to the stomata and diffuses out