The correct Answer is A-1, B-4, C-2, D-3
Explanation
Ecological classification of organisms is based on their trophic levels and feeding relationships within an ecosystem. Organisms are categorized as producers, consumers (primary, secondary, tertiary), or decomposers (detritivores) according to how they obtain energy.
Statement-wise Analysis
- A. Producer - 1. Phytoplankton:
- Correct. Producers are organisms that produce their own food, typically through photosynthesis. Phytoplankton are microscopic marine algae that perform photosynthesis, forming the base of many aquatic food webs.
- B. Primary consumer - 4. Goat:
- Correct. Primary consumers are herbivores that feed directly on producers. Goats are herbivores that consume plants, making them primary consumers.
- C. Secondary consumer - 2. Man:
- Correct. Secondary consumers are carnivores or omnivores that feed on primary consumers. Humans (man) are omnivores and can consume herbivores (e.g., goat, chicken), thus acting as secondary consumers.
- D. Detritivore - 3. Earthworm:
- Correct. Detritivores are organisms that feed on dead organic matter (detritus). Earthworms consume decaying plant and animal matter in the soil, playing a crucial role in decomposition.
Key Takeaway
Trophic levels categorize organisms based on their energy source: producers generate their own food, primary consumers eat producers, secondary consumers eat primary consumers, and detritivores decompose dead organic matter.