MCQ-3: Plant Nutrition

The graph shows the concentration of oxygen in the air spaces of a green leaf of a plant during a 12-hour period.

Which statement about carbon dioxide in the air spaces during time X is correct?

The average number of chloroplasts in four different types of cell taken from a plant is shown.
Which is a root hair cell?

An experiment was carried out using the apparatus shown.
The carbon dioxide content of the water in each test-tube was measured at the start and again three hours later.
In which test-tube would there be a decrease in carbon dioxide content?

The diagram shows a plant cell.

Which type of cell is shown?

The diagram shows the structure of cells from the leaf of a plant.

What type of cells are they?

Which region in the leaf of a green plant contains phloem?

Two sealed test-tubes containing aquatic plants and hydrogencarbonate indicator were set up.

The indicator in the sealed test-tubes shows the concentration of dissolved carbon dioxide present.

One of the sealed test-tubes was kept in the light for 24 hours and one of the sealed test-tubes was kept in the dark for 24 hours.
The results are shown in the table.

What is the correct explanation of what has taken place?

The diagram shows a leaf as seen in cross-section under the microscope.

What are tissues 1, 2 and 3?

The diagram shows an experiment investigating the effect of light intensity on an aquatic plant.

Photosynthesis occurred in both test-tube P and test-tube Q. Both test-tubes were kept at the same temperature. The number of bubbles produced in test-tube P was 12 bubbles per minute.
What is the most likely number of bubbles produced in one minute in test-tube Q?

Which substance is used up in photosynthesis?