Question

Assertion (A): The rate of breathing in aquatic organisms is much faster than in terrestrial organisms.
Reason (R) :The amount of oxygen dissolved in water is very high as compared to the amount of oxygen in air.

• A. Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
• B. Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
• C. Assertion (A) is true, but Reason (R) is false.
• D. Assertion (A) is false, but Reason (R) is true.

Answer 1

The Correct Option is C

Step 1: Understanding the Assertion (A):
The assertion states that the rate of breathing in aquatic organisms is much faster than in terrestrial organisms. This is true because aquatic organisms have to extract oxygen from water, which contains much less oxygen than air. To obtain enough oxygen, aquatic organisms must breathe at a faster rate. This is in contrast to terrestrial organisms, which extract oxygen from air, where oxygen is more readily available.

Step 2: Understanding the Reason (R):
The reason suggests that the amount of oxygen dissolved in water is very high compared to the amount of oxygen in the air. This statement is false. In fact, the amount of oxygen dissolved in water is much lower than the amount of oxygen in the air. While air contains about 21% oxygen, water contains only a small fraction of this amount, making it more challenging for aquatic organisms to obtain sufficient oxygen.

Step 3: Analyzing the Correctness of the Answer:
- Assertion (A) is true: The rate of breathing in aquatic organisms is indeed much faster than in terrestrial organisms due to the lower availability of oxygen in water compared to air.
- Reason (R) is false: The reason is incorrect because the oxygen content in water is much lower than in air, not higher.

Conclusion:
The correct answer is: Assertion (A) is true, but Reason (R) is false.