Q. Consider the following statements:
Assertion (A): In a forest ecosystem, the pyramid of numbers is generally inverted.
Reason (R): A few large-sized trees support a greater number of herbivores, parasites, and hyperparasites at successive trophic levels.
For the Assertion (A) and Reason (R) below, choose the correct alternative from the following.
Answer: A
Notes:
Explanation:
- In forest ecosystems, the pyramid of numbers is inverted because a small number of large-sized producers (trees) support a greater number of herbivores (like birds), parasites, and hyperparasites at higher trophic levels.
- Thus, both the assertion and reason are correct, and the reason appropriately explains why the pyramid is inverted in forest ecosystems.
Source: Environment (NCERT)

