Transport Systems in Plants Quiz

Name the 2 substances transported by the xylem and phloem vessels.

• Water and sugar

• Carbon dioxide and oxygen

• Glucose and minerals

• Nitrates and nutrients

Name the substance transported by the phloem vessel.

• Glucose

• Water

• Oxygen

• Minerals

Which row in the table describes features of phloem?

• Made up of sieve tubes and companion cells

• Made of dead cells

• Supported by the protein Lignin

• Water is present

An increase in which of the following factors would decrease the rate of transpiration in plants?

• Temperature

• Wind speed

• Humidity

• Surface area

Name tissue W.

• Palisade mesophyll

• Xylem

• Phloem

• Spongy mesophyll

The cells in tissue W have a greater number of chloroplast than other cells. Suggest an advantage of these cells being located near the upper surface of the leaf.

• Receive more sunlight for photosynthesis

• Receive more water for transpiration

• Receive more nutrients for growth

• Receive more carbon dioxide for respiration

The leaf vein consists of xylem and phloem tissues. Give one feature of each of these tissues.

• Xylem- Contains lignin in the walls

• Xylem - Carries sugar around the plant

• Phloem - Carries water and minerals from the roots to the leaves

• Xylem - Made of living tissue

Which of the following shows the passage of water through the tissues when it enters a plant?

• Root hair - xylem - spongy mesophyll

• Root hair - spongy mesophyll - xylem

• Xylem - spongy mesophyll - root hair

• Spongy mesophyll - xylem - root hair

A student investigated the link between transpiration rate and the number of leaf stomata. Calculate the expected number of stomata present in 1mm² on this leaf surface. The area shown on the diagram above measures 0.04mm². 

• 6

• 150

• 24

• 250

A leaf from another plant, species B, had fewer stomata per mm² of leaf surface and a different rate of transpiration. It was concluded that the number of stomata present affects the rate of transpiration. Suggest an advantage to plant species B of having fewer stomata.

• Improved structural support

• Reduced water loss

• Enhanced nutrient absorption

• Increased photosynthesis