Photosynthesis

Q.

What is the end product of photosynthesis?

Q. Carbon dioxide and oxygen are balanced in the atmosphere by _____________.

1. combustion & galvanisation
2. ozonolysis & combustion
3. respiration & combustion
4. photosynthesis & respiration

Q. Which gas is produced by the plants during the process of photosynthesis?

1. Oxygen
2. Nitrogen
3. Carbon dioxide
4. Carbon monoxide

Q.

What may happen on the earth in the absence of photosynthesis?

Q. Plants prepare their own food by the process called .

1. circulation
2. breathing
3. photosynthesis
4. respiration

Q. Does photosynthesis and respiration takes place in plants at short intervals during the day

Q.

Which of the following is released during photosynthesis?

1. oxygen

2. carbon dioxide.

3. light

4. energy

Q.

The gas present in the atmosphere which is essential for respiration of plants is ___ .

1. Plants don't breath.

2. Oxygen

3. Carbon dioxide

4. Nitrogen

Q.

________ gas is also known as the inactive component of air.

Q. How is the level of oxygen maintained in the atmosphere

Q.

In which of the following processes do plants require carbon dioxide?

1. Growth

2. Photosynthesis

3. Transpiration

4. Reproduction

Q.

Leaves give out oxygen during photosynthesis.

1. True
2. False

Q. Plants take in oxygen during photosynthesis.

1. True
2. False

Q.

Plants can carry out photosynthesis without carbon dioxide.

1. True
2. False

Q.

The component of air used by green plants to make their food is ___ .

1. Sulphur dioxide

2. Carbon dioxide

3. Nitrogen

4. Oxygen

Q.

Why was the apparatus holding the plant covered with a dark cloth in this experiment?

1. to decrease the temperature

2. to make the plant produce more food

3. to stop photosynthesis completely

4. just to improve the aesthetics

Q. is the process by which green plants make food in the presence of sunlight.

1. Food synthesis
2. Respiration
3. Photosynthesis
4. Transpiration

Q.

______ is the most abundant gas in the atmosphere and makes up 78% of the air.

Q.

Why should we cover the bell jar with a black cloth during the experiment?

Q. Experiment to prove that sunlight is essential for photosynthesis.

Q. Which of the following process releases oxygen into the air?

1. Photosynthesis
2. Respiration
3. Transpiration
4. Digestion

Q. Leaves are green in colour due to the presence of the pigment .

1. xanthophyll
2. chlorophyll
3. hemoglobin

Q. ___ is a biological process used by plants to prepare their food with the help of sunlight and energy

Q. Escape of water out of the leaf surface is called transpiration.

1. False
2. True

Q.

Which gas is produced by the plants during the process of photosynthesis?

1. Nitrogen

2. Carbon dioxide

3. Carbon monoxide

4. Oxygen

Q. (1)

Make sentences using the given set of words.​

​(a) 99%, oxygen, nitrogen, air, together

(2)

Make sentences using the given set of words.​

​(b) Respiration, dissolved, animals, air, aquatic

(3)

Make sentences using the given set of words.​

​(c) Air, wind, motion, called

Q. The component of air used by green plants to make their food is:

1. Nitrogen
2. Oxygen
3. Carbon dioxide
4. Sulphur dioxide

Q. _________ is a process for which plants require carbon dioxide.

1. Photosynthesis
2. Transportation
3. Growth
4. Reproduction

Q.

Name the constituent of air which is essential for photosynthesis.

Q.

Fruits are obtained from ______.

1. plants

2. animals

3. dead matter

4. None of these