Environment and Ecology
PART-A Unit-I: General Science
Previous Year Questions (PYQ) for this topic
Every TNPSC question asked from this topic, compiled as a PDF. · PDF 4.4 MB
Environment and Ecology - PYQ Points
• International Day for Biological Diversity: May 22.
• Father of Economic Ecology: M.S. Swaminathan.
• Earth Summit: Another name for the United Nations Conference on Environment and Development (UNCED).
• Father of Economic Ecology: M.S. Swaminathan.
• Earth Summit: Another name for the United Nations Conference on Environment and Development (UNCED).
1. Ecosystem and Its Components
- Main Components: An ecosystem consists of biotic (living) and abiotic (non-living) factors.
- Food Web: A network of interconnected food chains.
- Energy Pyramid: The pyramid of energy in an ecosystem is always upright.
- Marine Ecosystem: The largest ecosystem in the world. Phytoplankton are the primary producers in the ocean.
- Benthic Organisms: Organisms that live at the bottom of water bodies.
2. Biological Processes
- Homeostasis: The process by which an organism maintains a stable internal environment despite external changes.
- Ecesis: The establishment and expansion of an organism in a new habitat.
- Ammonification: The bacteria involved in this process include Bacillus ramosus.
- Hibernation: During this state, oxygen consumption decreases and body temperature drops by about 1–2°C below the surrounding environment.
3. Biosphere Reserves and Organizations
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