Question

Why is diffusion insufficient to meet the oxygen requirements of multicellular organisms like humans?​

Answer 1

Answer:

Diffusion is unable to meet the oxygen requirements of multi-cellular organisms such as humans because diffusion is one of the slow processes. That is a lot of time is required for oxygen to circulate to all the cells of the body. Therefore, through diffusion, it becomes difficult for oxygen to reach all the cells.

Answer 2

Answer:

Lesser the pH value more acidic is the solution and higher the pH value more alkaline is the solution.

1. Weakly alkaline: D (pH = 11)

2. Neutral: C (pH = 7)

3. Strongly acidic: A (pH = 1)

4. Strongly alkaline: E (pH = 13)

5. Weakly acidic: B (pH = 5)

Explanation:

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