FAQs
1. Define an eco-system.
Biological assemblage of plants, animals and microbes, taken
together with their physicochemical environment is called an ecosystem. E.g. Forests, Oceans
2. What is adaptation? List some reason that causes organisms to
adapt.
A physical trait of an organism that has changed over time to help
them survive in their environment is known as adaptation.
Organisms adapt to find food for survival or to attract a mate.
3. What are the factors that determine the composition of a biome?
The factors that determine the composition of a biome are :
 Temperature
 Rainfall
 Soil / water characteristics
4. What is the role of autotrophs in an eco system?
A group of organisms that can use the energy in sunlight to
convert water and carbon dioxide into Glucose (food) through
photosynthesis is called autotrophs. Autotrophs are also called
producers because they produce all of the food that heterotrophs
use. Without autotrophs, there would be no life on this planet.
Examples: Plants and Algae
5. What is a food chain?
Food chain is a pathway for transfer of energy from one trophic
level to another. It always starts with Sun as the source of energy.
Eg. Grazing food chain