Transport in Plants End-of-chapter Revision IGCSE Level

Reorder the following to show the pathway of water as it is taken by plants.

• root hairs

• cortex

• air spaces

• mesophyll

• xylem

When water is taken, ​ (a)   occurs. The process happens down the ​ (b)   between either side of the ​ (c)   . This process happens because the cytoplasm of the root hair cells has ​ (d)   concentration of ions. The entire process is ​ (e)   .

• osmosis
• potential gradient
• membrane
• more
• passive
• less
• active

Xylem and phloem appear in the ______________ of the leaf, as well as in the leaf veins.

• petiole

• leaf blade

• epidermis

• midrib

Which tissue in plants whose cells are dead and hollow?

Match the following

• Evaporation

• Increase surface area

• Humidity

• Measure of how much water vapour in the air

• Transpiration

• Evaporation occurs here

• Root hair cells

• Diffusion of water vapour from the leaves

• Cell wall

• Change of liquid to gaseous state

What can trigger the closure of stomata?

• extreme drought

• light intensity

• moderate temperature

• slightly increased carbon dioxide concentration

What sugar is transported in the phloem?

Which of the factors here, if increased, will increase the rate of transpiration?

• humidity

• wind speed

• temperature

• oxygen concentration

Reorder the following from the beginning.

• Water diffuses from the soil into the roots.

• Water is lost from leaves.

• Water in the xylem vessels diffuses into the mesophyll cells.

• Water molecules move together as one column due to cohesion.

• Water potential in roots decreases.

Position the labels correctly for both axes of the graph.

a

b

rate of transpiration

humidity