Transport system in plants

Question 1

Function of xylem vessels

Answer 1

Transport water and mineral salts from the roots to all parts of the plant

Question 2

Function of phloem vessels

Answer 2

Transports manufactured food(sugars&amino acids) from the leaves to all parts of the plant

Question 3

How do water molecules enter the roots?

Answer 3

Water molecules move from the soil into the root hair cell by osmosis.Once in the root hair cells, water molecules move into the inner root cells by osmosis until they enter the xylem vessels.

Question 4

How do mineral salts enter the root hair cells?

Answer 4

When the concentration of mineral salts in the soil is higher than that in the root hair cells, mineral salts diffuse from the soil into the root hair cells.
When the concentration of mineral salts is lower than that in the root hair cells, mineral salts move from the soil in to the root hair cells by action e transport.

Question 5

How do water and mineral salts move up the plant?

Answer 5

Transpiration creates a pulling force known as transpiration pull.This force enables water and mineral salts to move up the xylem vessels from the roots to the leaves in a plant.(Wilting occurs when the rate of transpiration is higher than the rate of absorption.)