Transport in plants Quiz

Multiple Choice

If percentage humidity in the atmosphere is high, is there a higher or lower amount of water vapour in the air?

• Higher

• Lower

Multiple Choice

Since there is a higher amount of water vapour in the air, is there a less steep or steeper concentration gradient between water vapour in the leaf and water vapour in surrounding air?

• Less steep

• Steeper

Multiple Choice

How does wind movement affect the rate of transpiration?

• Doesn't affect at all. Rate of transpiration remains the same as wind movement is not one of the factors affecting the rate of transpiration.

• Rate of transpiration is slower. The purpose of transpiration is to cool down the plant. Having another cooling mechanism means the plant won't have to loose so much water.

• Rate of transpiration is faster. The wind will blow the damp air away from the surface of the leaves and replace it with drier air.

Fill in the Blanks

What is removed in this experiment?

Fill in the Blanks

What are the substances that CANNOT be transported in this experiment?

Multiple Select

What are the functions of the xylem (Note: There are two answers!)

• Has lignin and no protoplasm or cross walls

• Transports water

• Provides mechanical support for the plant

• Transports water and dissolved mineral salts

Multiple Select

What are the structural adaptations of the xylem (Note: There are two answers!)

• Consists of living cells

• Has lignified cell walls

• Is one long hollow tube

• Protoplasm and cross walls are absent

Fill in the Blanks

As percentage humidity in the atmosphere ________, the rate of transpiration is _________.

Multiple Choice

Which transport vessel transports substances only in ONE direction?

• Xylem

• Phloem