AIIMS 2005 Botany Distribution and Ecology Assertion Reason Question

To tackle this question effectively, we need to analyze both the assertion and the reason provided.

Assertion:

"The fungi are widespread in distribution and they even live on or inside other plants and animals."

This statement is indeed true. Fungi are known for their diverse habitats. They can be found in a variety of environments including soil, decaying matter, and as symbionts or parasites on other organisms, both plants and animals. This ecological versatility contributes to their widespread distribution.

Reason:

"Fungi are able to grow anywhere on land, water, or on other organisms because they have a variety of pigments, including chlorophyll, carotenoids, fucoxanthin, and phycoerythrin."

This statement is false. While it is correct that fungi can grow in various environments, the reason provided is incorrect because fungi do not possess chlorophyll, which is the pigment necessary for photosynthesis in plants. Fungi are heterotrophic organisms, meaning they obtain their nutrients by absorbing organic compounds from their surroundings, rather than through photosynthesis like plants. The pigments mentioned (carotenoids, fucoxanthin, and phycoerythrin) are primarily associated with photosynthetic organisms like algae and plants, not fungi.

Conclusion:

Given that the assertion is true and the reason is false, the correct answer to the question is C) If Assertion is true statement but Reason is false.

Clarification of Other Options:

• Option A: This option states both the assertion and reason are true, with the reason being a correct explanation for the assertion. This is incorrect because the reason is false.

• Option B: This option claims both the assertion and reason are true, but the reason does not explain the assertion. Since the reason is false, this option is also incorrect.

• Option D: This option states that both the assertion and reason are false. Since the assertion is true, this option is incorrect as well.

Summary:

• Assertion: True (Fungi are widespread and can live in various environments, including on or within other organisms).
• Reason: False (Fungi do not have chlorophyll or the mentioned pigments for photosynthesis).

Thus, the correct answer is C.