2.5 Transport Systems In Plants

Question 1

What does the xylem tissue do?

Answer 1

Transports water and mineral ions from the roots of the plant to the stem, leaves and flowers

Question 2

What is the transpiration stream?

Answer 2

The movement of water from the roots through the xylem tissue and out of the leaves

Question 3

What tissue carries dissolved sugars from the leaves to the rest of the plant?

Answer 3

Phloem

Question 4

What does phloem do?

Answer 4

Carries food, such as dissolved sugars, from the leaves to the rest of the plant

Question 5

Name 4 factors that affect transpiration rates

Answer 5

• wind
• temperature
• humidity
• light intensity

Question 6

Explain how wind affects the transpiration rate

Answer 6

The faster the wind speed, the air is moving faster, meaning the water in the air is moving faster, meaning the concentration gradient of the water remains the same

Question 7

What tissue in a plant carries water and mineral ions from the roots to the stem, leaves and flowers?

Answer 7

Xylem

Question 8

Explain how high temperatures affect transpiration rate

Answer 8

Gives the particles in transpiration more energy so the diffusion happens faster

Question 9

Explain how low humidity affects transpiration rates

Answer 9

There is less water in the air so their is a steeper concentration gradient so osmosis can happen without using active transport and using energy

Question 10

Explain how high light intensity affects the rate of transpiration

Answer 10

The light heats up the plant, so the stomata open so water is lost more