1. Select the mis-matched pair in the following and correct it. (a) Biomagnification — Accumulation of chemicals at the successive trophic levels of a food chain (b) Ecosystem — Biotic components of environment (c) Aquarium — A man-made ecosystem Parasites — Organisms which obtain food from other living organisms

• Soln:

• Biomagnification — Accumulation of chemicals at the successive trophic levels of a food chain
• Ecosystem — Biotic components of environment
• Aquarium — A man-made ecosystem
• Parasites — Organisms which obtain food from other living organisms Soln:

Answer is (b) Ecosystem — Biotic components of environment

Both biotic and abiotic components of environment constitute an ecosystem.