Transpiration & Translocation (Cambridge O Level Biology)

Which of the following processes is/are involved in the loss of water from the leaves of plants?

1. diffusion
2. osmosis
3. condensation
4. evaporation

A student collected some of the solution from the phloem in the stem of a plant. 

Which of the following would be present in the liquid?

A decrease in which of the following factors would normally cause the transpiration rate to increase?

Which environmental factor is most likely to be responsible for a plant to wilt?

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

Where does water evaporate? 

Which row shows how the rate of transpiration changes when conditions in the atmosphere change?

The diagram below shows part of the trunk of a small dicotyledonous tree with a ring of bark removed.

Removing the ring of bark removes one type of transport tissue but leaves the other type intact.

What effect does removing the bark have on the two branches?

The xylem has specific adaptations to allow it to transport water and mineral ions from the roots of a plant to the leaves as a result of transpiration.

Which processes produce the adaptations in xylem vessels to allow the continuous flow of water?

Which of the following graphs shows most clearly what would happen to the rate of transpiration as humidity decreases?

The diagram below shows two shoots at the start of an experiment set up by a group of students.

What are the most likely readings on the spring balances after four days?

The table below shows some characteristics of four different plants. 

The plants are growing in the same environmental conditions. 

Which plant will have the lowest rate of transpiration?

Which row of the table below shows substances transported through the phloem and xylem, and the direction of transport, correctly?