Transport in Plants MCQ

Transport in
Plants (MCQ)

Multiple Choice

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

• A

• B

• C

• D

Multiple Choice

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

What causes the change in the appearance of the plant?

• Water loss is greater than water uptake.

• Water moves from the leaves to the stem.

• Water uptake is equal to water loss.

• Water uptake is greater than water loss.

Multiple Choice

By which process is water lost from a leaf?

• active transport

• diffusion

• osmosis

• photosysnthesis

Multiple Choice

The lower end of a plant stem is placed in water coloured with red dye. After three hours, the stem is cut as shown in the diagram.

Which labelled region is stained red?

• A

• B

• C

• D

Multiple Choice

What is transported in the phloem and what is the direction of transport?

• starch, up and down

• starch, up only

• sucrose, down and up

• sucrose, down only

Multiple Choice

In which order does water pass through the cells of a plant, as the water travels from the roots to a leaf?

• mesophyll --> root hair --> root cortex --> xylem

• root cortex --> root hair --> xylem--> mesophyll cells

• root hair --> mesophyll cells --> root cortex --> xylem

• root hair --> root cortex --> xylem --> mesophyll cells

Multiple Choice

The diagram shows a plant shoot and the same shoot six hours later.

Which change in environmental conditions could cause this change in the shoot?

• a decrease in available water

• a decrease in light intensity

• a decrease in wind speed

• an increase in humidity

Multiple Choice

A celery stalk is placed in a beaker of blue dye. Once the dye reaches the leaves, the stallk is taken out and cut in half.

Which diagram shows the appearance of the cut and end of the stalk?

• A

• B

• C

• D

Multiple Choice

The diagram shows a cross-section through a plant root.

Q shows the part that is stained red when the root is placed in water containing a red dye.

What is found at Q?

• guard cells

• palisade cells

• phloem

• xylem

Multiple Choice

Which processes produce a continuous space for the flow of water in xylem vessels?

• A

• B

• C

• D

Multiple Choice

Some liquid is collected from the xylem in the stem of a plant. What is present in the liquid?

• cellulose

• inorganic ions

• starch

• sugar

Multiple Choice

What is a function of phloem?

• translocation

• transpiration

• storage of food

• support

Multiple Choice

The diagram shows part of the trunk of a small tree with a ring of bark removed. Removing the ring of bark takes away phloem but leaves the xylem intact.

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

• A

• B

• C

• D

Multiple Choice

The table shows some characteristics of four different plants.

The plants are growing in the same environmental conditions.

Which plant will have the highest rate of transpiration?

• A

• B

• C

• D

Multiple Choice

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

• humidity

• light intensity

• stomatal opening

• temperature

Multiple Choice

What is the path of water through a plant?

• cortex cells → xylem → stomata → roots

• root hair → xylem → mesophyll cells → stomata

• roots → cortex cells → stomata → phloem

• roots → root hair → stomata → xylem

Multiple Choice

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

• mesophyll → xylem → root cortex

• root cortex → mesophyll → xylem

• root cortex → xylem → mesophyll

• xylem → mesophyll → root cortex

Multiple Choice

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?

• A

• B

• C

• D

Multiple Choice

Which statements about plant transpiration are correct?

• A

• B

• C

• D

Multiple Choice

The table shows the rate of water flow through a tree over a 12 hour period.

What conclusion can be drawn from the table?

• Between 7:00 and 17:00 hours the rate of flow continuously increases.

• The greatest increase in rate of flow in a two-hour period is between 11:00 and 13:00 hours.

• Water does not flow up through a tree at night.

• Water flow is affected by humidity.

Drag and Drop

Which words correctly complete the following sentence?

‘Transpiration is the​

Placeholder

of water at the surface of the ​

Placeholder

cells followed by the ​

Placeholder

​ of water vapour from the plant​

Placeholder

.

Drag these tiles and drop them in the correct blank above

evaporation

mesophyll

loss

leaves

active uptake

xylem

diffusion

gain

root

cuticle

Multiple Choice

What could increase the rate of water uptake by a shoot?

• covering the shoot with a black plastic bag

• covering the shoot with a clear plastic bag

• removing the leaves from the shoot

• shining a bright light onto the shoot

Multiple Choice

The diagram shows how water is lost from a leaf.

By which process is the water lost?

• osmosis

• photosynthesis

• translocation

• transpiration

Multiple Choice

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

Q shows the part that is stained red when the stem is placed in water containing a red dye. What is found at Q?

• guard cells

• palisade cells

• phloem

• xylem

Multiple Choice

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

What is X?

• humidity

• light intensity

• soil moisture

• temperature

Multiple Choice

In what form does a plant absorb and lose water?

• A

• B

• C

• D

Multiple Choice

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

• mesophyll → root hair → xylem

• mesophyll → xylem → root hair

• root hair → mesophyll → xylem

• root hair → xylem → mesophyll

Multiple Choice

Which two substances are transported in the phloem?

• amino acids and protein

• amino acids and sucrose

• protein and starch

• starch and sucrose

Multiple Choice

What is a description of transpiration?

• exchange of gases between the leaf and the atmosphere

• loss of water vapour from the leaves and stems of a plant

• movement of water from the roots to the leaves

• movement of water through the cells of the leaf

Multiple Choice

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?

• Amino acids and sucrose cannot pass to the roots.

• Dissolved salts cannot pass to the leaves.

• Water cannot pass to the leaves.

• Water cannot pass to the roots.

Multiple Choice

The diagram shows a plant.

What is the pathway taken by most of the water absorbed by this plant?

• X → Y → Z

• W → Y → Z

• Z → Y → X

• Z → Y → W

Multiple Choice

The diagrams show stages in the passage of water through a plant.

The circles are the starting points for arrows to show the direction in which the water moves.

Which circle must have an arrow pointing downwards only?

• A

• B

• C

• D

Multiple Choice

Translocation occurs in phloem tubes. Aphids feed on the contents of phloem tubes.

What type of food would be lacking in their diet?

• amino acid

• fat

• sucrose

• water

Multiple Choice

Which two functions does xylem perform?

• A

• B

• C

• D

Multiple Choice

The diagram shows cells from a storage organ of a flowering plant after they have been stained with iodine solution.

Structures X stain black.

What does this show that structures X contain?

• chlorophyll

• fat

• starch

• sugar

Multiple Choice

What shows the correct translocation of carbohydrate in a potato plant that is growing in bright sunlight?

• A

• B

• C

• D

Multiple Choice

Which conditions of humidity, light intensity and temperature make transpiration slowest?

• A

• B

• C

• D

Multiple Choice

The diagram shows how the appearance of a potted plant changes over a period of four days.

Which environmental conditions are most likely to cause this change?

• A

• B

• C

• D

Multiple Choice

The table shows four substances and the parts of the plant to which they are transported.

Which are examples of translocation?

• 1 and 2

• 1 and 3

• 2 and 4

• 3 and 4