Quiz on Plant transport

Which of the following factors would normally cause the transpiration to decrease?

• faster air movement

• higher humidity

• more light intensity

• higher temperature

Which of the following is a correct explanation of the effect of root hairs on absorption?

• Provide a large surface area, maximising the rate of absorption of water and ions by osmosis

• Provide a large surface area, maximising the uptake of water by osmosis and ions by diffusion

• Provide a large surface area, increasing the rate of absorption of water and ions by osmosis

• Provide a large surface area, maximising the rate of absorption of water by osmosis and ions by active transport

A celery stalk is placed in a beaker of blue dye. Once the dye reaches the leaves, the stalk is taken out and cut in half. Which diagram shows the appearance of the cut end of the stalk?

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Which structure is a xylem vessel?

Name the two substances that are transported in the phloem. In alphabetical order.

Roots and leaves both act as a source and a sink for sucrose and amino acids at different times during the year. At which point in the year are the roots most active as a source?

• A

• B

• C

• D

The diagram below shows how water is lost from a leaf.

Which of the following processes refers to the loss of water vapor in plants through the stomata.

• capillary action

• osmosis

• transpiration

• translocation

Which of the following conditions will result to highest rate of transpiration?

• A

• B

• C

• D