Question 7 of 7intermediate⚖️ EvaluateEssay5 marks

Photosynthesis and respiration are essential to maintain balance in nature. Discuss.

Correct Answer

Photosynthesis and respiration are complementary processes that maintain the balance of gases in nature.

During photosynthesis, plants take in carbon dioxide from the air and release oxygen as a byproduct. This oxygen is used by all living organisms, including plants themselves, for respiration.

During respiration, organisms take in oxygen and release carbon dioxide. This carbon dioxide is then used by plants for photosynthesis.

Thus, the two processes create a natural cycle where the output of one process becomes the input for the other.

If either process stopped, the balance would be disrupted. Without photosynthesis, oxygen levels would decrease and carbon dioxide would increase. Without respiration, carbon dioxide levels would decrease and oxygen would accumulate excessively.

This interdependence ensures that the atmosphere maintains the right proportions of oxygen and carbon dioxide, supporting all life forms on Earth. The balance maintained by these processes is crucial for the survival of all living organisms.

Exercise: Let Us Enhance Our Learning | Q: 10 | (Page Page 16)
For More Understanding

Explanation

The chapter explains on page 13 that during respiration, glucose is broken down using oxygen to release carbon dioxide, water, and energy. During photosynthesis (page 10), plants use carbon dioxide and water to produce glucose and oxygen. The Exploratory Projects section on page 16 also mentions how a sealed bottle garden demonstrates this balance—carbon dioxide produced during respiration is used for photosynthesis, and oxygen generated during photosynthesis is used for respiration.

Solution Steps

  1. Photosynthesis and respiration are complementary processes that maintain the balance of gases in nature

  2. During photosynthesis, plants take in carbon dioxide and release oxygen as a byproduct

  3. During respiration, organisms take in oxygen and release carbon dioxide

  4. The two processes create a natural cycle where the output of one becomes the input for the other

  5. Without photosynthesis, oxygen levels would decrease and carbon dioxide would increase

  6. Without respiration, carbon dioxide levels would decrease and oxygen would accumulate excessively

  7. This interdependence ensures the atmosphere maintains the right proportions of gases for all life forms

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