Q. Consider the following:

1. Energy flow in an ecosystem is unidirectional.
2. A food chain always begins with photosynthetic autotrophs.

Which of the above statements is / are correct?
Answer: Both 1 and 2
Notes: Statement 1 is correct because energy in an ecosystem flows in one direction: from producers to consumers to decomposers. Statement 2 is correct, as food chains typically start with photosynthetic autotrophs (such as plants or algae), which capture solar energy and produce food for primary consumers. Hence, both statements are correct.