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Gas Exchange in Plants

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Questions and Answers

What is the primary role of green plants during photosynthesis?

To consume glucose and release nitrogen

To use oxygen and release carbon dioxide

To produce food using carbon dioxide and produce oxygen (correct)

To absorb sunlight and release heat energy

What colour does the hydrogencarbonate indicator turn in the presence of a higher than normal level of carbon dioxide?

Yellow (correct)

Green

Red

Purple

What can be concluded if the indicator in tube A turns purple after five hours?

The leaves are taking in carbon dioxide (correct)

The leaves are releasing carbon dioxide

The initial carbon dioxide level was high

The leaves are not photosynthesizing

Why are tubes B and D considered control setups in the experiment?

They help validate the gas exchange caused by the leaves Signup and view all the answers

What happens to the color of the hydrogencarbonate indicator in tube C under dark conditions?

It turns yellow Signup and view all the answers

What is observed in tube B after five hours when no leaves are present?

The indicator remains red Signup and view all the answers

What do the results indicate about the role of green leaves in gas exchange?

They take in carbon dioxide during light and release it in the dark. Signup and view all the answers

What would be the expected color change in tube D after five hours in bright light?

Red Signup and view all the answers

What is the primary process that occurs in plants under light conditions?

Both photosynthesis and respiration occur, with photosynthesis at a higher rate Signup and view all the answers

What is the result of the gas exchange in plants during dark conditions?

Net release of carbon dioxide and net uptake of oxygen Signup and view all the answers

What role do stomata play in plants?

They facilitate gas exchange by allowing gases to enter or exit the leaves Signup and view all the answers

Which statement accurately describes the net uptake of gases during photosynthesis?

Plants absorb more carbon dioxide than they release Signup and view all the answers

What is the correct magnification to start observing a prepared slide of leaf epidermis?

100X Signup and view all the answers

Which of the following is NOT a function of stomata?

Absorbing sunlight Signup and view all the answers

What is the key point regarding gas exchange in plants?

Gas exchange is primarily through stomata Signup and view all the answers

What type of drawing is recommended for the observation of stomata under the microscope?

A labelled diagram with proportionate parts drawn in pencil Signup and view all the answers

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Description

This quiz focuses on the processes of gas exchange in plants, emphasizing photosynthesis and respiration. It also covers the experimental methods used to study carbon dioxide uptake and release in plants. Test your understanding of the importance of these processes in plant biology.