NOTES OF CLASS 7
Hi my dear students ! How are you? I hope you are healthy and safe. So, let's start our journey of learning. Today I will give you some facts related to higher level of organisation.
Population :- Group of similar kind of organisms forms the population. For example - Group of human ( human population ), Group of cow ( Cow Population ) and so on.
Community :- Combination of populations form the community. For ex. In our surrounding community, following populations are present - Human population, Goat population, Mosquito population, Cow population etc.
Ecosystem :- Some abiotic substances like soil, water, air are necessary for life activities of community members. Community along with abiotic substances is known as Ecosystem.
Biosphere :- All ecosystems of earth collectively called the biosphere. Broadly the biosphere contain hydrosphere (all water bodies), lithosphere ( solid surface of earth ), atmosphere ( gaseous cover around earth ).
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