Plant Tissues, Organs & Systems Practice Questions

Name tissues A and B.

C is a vascular bundle.

Name the tissue in C that transports water.

Name cell E and give the function of this cell.

Meristem tissue is found in two places in a plant.

Name these two places.

Describe what happens to the cells in meristem tissue.

Which statement describes translocation?

Tick (✓) one box.

• The movement of water from the roots to the leaves
• The movement of dissolved sugars from the leaves to the rest of the plant
• The loss of water vapour from the surface of a leaf
• The uptake of mineral ions from the soil into the roots

Name the plant tissue in which translocation takes place.

The cells of this tissue have pores in their end walls.

Suggest why these pores are important.

Each root hair cell has a long, thin extension.

Explain how this helps the plant to take up water.

Root hair cells contain many mitochondria.

Explain why.

Calculate the mean rate of water loss from the shoot over the 6 hours.

Give the unit.

The total surface area of the leaves on the shoot was $90\ \text{cm}^2$.

Calculate the mean rate of water loss per $\text{cm}^2$ of leaf.

Explain why the student floated a layer of oil on the surface of the water in the flask.

Calculate the percentage of the stomata on a maize leaf that are on the lower surface.

Give your answer to 1 decimal place.

Oak leaves have stomata only on the lower surface.

Suggest the advantage of this to the oak tree.

Explain the distribution of stomata in the leaves of the water lily.

Calculate the percentage increase in the rate of water uptake when the fan was blowing, compared with still air at 20 °C.

Explain why the fan increased the rate of water uptake by the shoot.

Explain why the rate of water uptake was lowest when a plastic bag was sealed over the leaves.

Complete the table.

The walls of xylem cells are strengthened with lignin.

Explain why this is important for the transport of water.

The leaf is a plant organ made of several different tissues.

Explain how the structures of the epidermis, the palisade mesophyll and the spongy mesophyll are related to their functions.

Describe the relationship between stomatal aperture and the rate of transpiration between 04:00 and 12:00.

Estimate the mass of water lost from each $\text{m}^2$ of leaf between 08:00 and 12:00.

Show your working.

Between 12:00 and 16:00 the stomatal aperture decreased, even though it was still light.

Explain why the plant partly closed its stomata, and why the rate of transpiration was still high at 16:00.