WJEC AS Biology Unit 2: Plant Transport

How does most water cross the root to the endodermis?

• By the apoplast pathway
• By the symplast pathway
• By the vacuolar pathway

Which pathway is blocked by the Casparian strip in the endodermis?

• Apoplast pathway
• Symplast pathway
• Vacuolar pathway

Which type of cell found in xylem contains pits?

• Vessels
• Tracheids
• Parenchyma
• Fibres

What force between adjacent water molecules helps transpiration?

• Cohesion
• Adhesion

What force between water molecules and lignin helps transpiration?

• Cohesion
• Adhesion

What is actually measured by a potometer?

• Water loss from leaves
• Water used in photosynthesis
• Water uptake

What is the effect of increasing leaf area on transpiration?

• It increases transpiration rate
• It decreases transpiration rate

What is the effect of increasing wind speed on transpiration?

• It increases transpiration rate
• It decreases transpiration rate

What is the effect of increasing humidity on transpiration?

• It increases transpiration rate
• It decreases transpiration rate

What is the effect of increasing temperature on transpiration?

• It increases transpiration rate
• It decreases transpiration rate