Q2 The diagram shows the pathway of water molecules through part of a leaf, seen under a microscope, in transverse section.

Where does water evaporate?

Q3 An experiment was set up to investigate the movement of blue dye up a herbaceous plant.

If a section is cut at X-X, which cross-section shows the distribution of the blue dye?

Q4 The diagram below shows a longitudinal section of a stem. Which is the vessel that transports dissolved salts solution?

Q5 A plant shoot is left in ink solution for several hours.

     A section is cut through the stem. What would the expected result be?

Q6 The diagram shows two shoots at the start of an experiment on transpiration.

What are the likely readings on the spring balances after three days?

Q7 The diagram below shows a potted plant after a few hours.

Which conditions will result in this change?

Q8 A plant was placed under abundant light and had its leaves exposed for a brief period to radioactive carbon dioxide (¹⁴CO₂) and watered with radioactive water (³H₂O). The diagram below shows a transverse section across the stem of the plant.

At which parts of the stem will each type of radiation be detected?

Q9 Five similar plants are placed in test-tubes as shown.

Some of the plants have their leaves coated with grease to reduce transpiration. Each plant is weighed in its test-tube at the start of the experiment and again two days later.

The results are shown in the table

 Which plants had their leaves coated with grease?

Q10 The table below shows the rates of water absorption and transpiration in a plant over a

period of time.

At what time does the plant begin to wilt?