Transport in Plants

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

increases?

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• 
• 
• 

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.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

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

Tags

NGSS.MS-LS1-2

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

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

a leaf?

• mesophyll cells → 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

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

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

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

Tags

NGSS.MS-LS1-2

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

What is present in the liquid?

• cellulose

• inorganic ions

• starch

• sugar

Tags

NGSS.MS-LS2-3

Which statements about plant transpiration are correct?

• A

• B

• C

• D

Tags

NGSS.MS-LS2-3

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