Symbiotic Cycle
Trending Questions
Name two processes which maintain the balance of carbon dioxide and oxygen in the atmosphere.
- True
- False
Which of the following statements is/are correct?
All green plants can prepare their own food
Most animals are autotrophs.
Carbon dioxide is not required for photosynthesis.
Oxygen is liberated during photosynthesis
- True
- False
96 Explain how the oxygen in the air is replaced.
- humans
- plants
- animals
- all of the above
Plants and animals living on land breathe out oxygen.
- True
- False
Give reasons for the following:
Plants maintain carbon dioxide – oxygen balance in nature.
This gas is required for the process of photosynthesis.
Nitrogen
Hydrogen
Carbon dioxide
None of these
- oxygen
- carbon dioxide
- nitrogen
- none of the above
- I - Respiration, II - Carbon dioxide
- I - Oxygen, II - Respiration
- I - Respiration, II - Oxygen
- I - Carbon dioxide, II - Oxygen
24 (c) State whether the following statements are true or false.
Trees need oxygen for photosynthesis.
- True
- False
- consumption of oxygen by plants
- consumption of carbon dioxide by plants
- consumption of oxygen by living beings
- consumption of carbon dioxide by animals
- No fire
- No animals
- No vegetation
- No water
- Photosynthesis
- Respiration
- Both A and B
- None of these
Below is a list of activities. You need to make a separate list of the ones which specifically require oxygen.
1)Flying of aeroplane
2)Respiration
3)Photosynthesis
4)Sky diving
5)Camp fire
- nitrogen
- oxygen
- carbon dioxide
- argon
- True
- False
Air dissolved in water contains a higher proportion of oxygen.
- Balance of oxygen and carbon dioxide by plants and animals.
- Not all organisms consume oxygen.
- There is enough oxygen for all the organisms.
- Carbon dioxide released by living organisms reacts with air to produce oxygen.
A process by which plants make their own food.
- Oxygen Cycle
- Water Cycle
- Photosynthesis
- Both A and C
- oxygen, carbon dioxide
- carbon dioxide, oxygen
- oxygen, sulphur dioxide
- sulphur dioxide, oxygen
- plant more trees
- cut down trees
- protect animal life
- kill all living beings