Select Board & Class

Login

Organisms and Environment - I

  • 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

 

  • Responses of organisms to abiotic factors –

 

  • Regulators are organisms that have the ability to maintain their constant body temperature. Example: birds and mammals
  • Conformers are organisms that cannot maintain their constant body temperature with respect to their surrounding environment.
    • The heat gain or heat loss from the body of an organism is the function of the body surface area relative to volume.
    • Therefore, the smaller organisms have larger surface area relative to their volume, and tend to…

To view the complete topic, please

What are you looking for?

Syllabus