MCQ-1: Transport in Plants

The diagram shows the stem of a plant. A strip of the outer tissue including the phloem has been removed.

How is transport in the plant affected?

In which order does water pass through these structures in a plant?

Which two substances are transported in the phloem?

The graph shows how the rate of transpiration is affected by X.

What is X?

Which words correctly complete the following sentence?
‘Transpiration is the ……1…… of water at the surface of the ……2…… cells followed by the ……3…… of water vapour from the plant ……4…… .’

A decrease in which factor normally causes transpiration rate to increase?

What is the path of water through a plant?

What contains the greatest concentration of lactic acid?

Which graph shows most clearly what will happen to the rate of transpiration as humidity increases?

The diagram shows a potted plant and the same plant 24 hours later.

What causes the change in the appearance of the plant?

Which process is an example of translocation?

The diagrams show cross-sections through a root and a stem.

Which labels are correct?

Which processes are used by root hairs to take up ions and water?

Which of the following increases transpiration?

The diagram shows a cross-section of a plant stem.

What is the function of the tissue labelled V?

Which process occurs during transpiration?

The diagrams show an experiment on transpiration.
Four leaves of the same species are balanced on two drinking straws. One or both sides of the leaves are covered in grease. Any difference in mass causes the heavier end to be lower.

At the start of the experiment the straws were positioned so that the leaves were level.
Which leaves will be lower after an hour?

The diagram shows a leaf attached to the stem of a plant.

What do the arrows at X represent?

The diagram shows part of a section through a plant stem.
Which tissue transports water from the roots to the leaves?

Petroleum jelly is waterproof and transparent.
Covering the underside of the leaves of a plant with a thin layer of petroleum jelly will slow down the rate of water loss from the plant.
Which statement explains this?