Transport In Plants

Question 1

What is capillarity?

Answer 1

The adhesion of water to the walls of a small tube(e.g xylem)

Question 2

What factors affect transpiration

Answer 2

Humidity: low = high trans
Temp: high=high trans
Wind speed: high= high trans (water blown away which increases water gradient + decrease humidity)

Question 3

What does the xylem do?

Answer 3

It transports water and mineral ions to all parts of plants.

Question 4

What is the xylem made of?

Answer 4

Dead cells and lighting which strengthens the walls

Question 5

What does the phloem do?

Answer 5

It transports sucrose, amino acids and plant growth substances
It also flows up and down where as the xylem only flows upwards

Question 6

What is the phloem made of

Answer 6

The cell wall is made up of cellulose

Question 7

Describe the movement of water through a plant

Answer 7

Water is absorbed by the roots and moves into the xylem via osmosis. It then travels up the stem due to the tension caused by transpiration and cohesion and capillarity. The water then moves into the palisade cells by osmosis and then into the spongy mesophyll and then diffuses/ evaporates into the air.