9.1 Transport in the xylem of plants Questionbank

A

B

C

D

Active translocation of mineral ions in roots

Active transport of organic compounds into sieve tubes

Raised hydrostatic pressure gradients

Evaporation of water from mesophyll cell walls

It absorbs minerals from the soil by active transport.

It translocates amino acids from source to sink.

It carries glucose to the leaves.

It contributes to the plant support with lignified walls.

I and II only

I and III only

II and III only

I, II and III

cell walls of epidermis $\rightarrow$ cell walls of cortex $\rightarrow$ endodermis

cell walls of root hair cells $\rightarrow$ cytoplasm of cortex $\rightarrow$ endodermis

cytoplasm of root hair cells $\rightarrow$ cytoplasm of cortex $\rightarrow$ endodermis

cell walls of root hair cells $\rightarrow$ cell walls of epidermis $\rightarrow$ endodermis

Only adhesion is involved in transpiration pull.

Only cohesion is involved in the movement of water in soil.

Only cohesion involves the interaction of water with soil mineral particles.

Only adhesion involves the interaction of water with xylem.

A

B

C

D