Q. Consider the following statements:

1. Algae are primary producers in aquatic ecosystems.
2. Most edible algae are marine algae as most freshwater algae are toxic.

Which of the above statements is / are correct?
Answer: Both 1 and 2
Notes: Algae are crucial primary producers in aquatic ecosystems, forming the base of the food chain by photosynthesizing. Most edible algae are marine because marine environments yield diverse, non-toxic seaweed species, whereas many freshwater algae contain toxins unsuitable for consumption. Therefore, both statements are factually correct based on ecological and nutritional studies.