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Organisms and Population

  • Ecology: It is the field of science that deals with the interrelationship between biotic and abiotic factors.
    • It includes four levels of biological organisation: organisms, populations, communities and biomes.
    •  Major abiotic factors: Light, temperature, water, air, soil, etc.
    • Eurythermal: Organisms that can tolerate wide range of temperature
    • Stenothermal: Organisms that live in a narrow range of temperature
    • Euryhaline: Organisms that can tolerate wide range of salinity
    • Stenohaline: Organisms that live in a narrow range of salinity

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