steeping stone main course book of English for class 7
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The simplest definition of an ecosystem is a community or group of living organisms that live in and interact with each other in a specific environment.
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Cells are the basic building blocks of all living things. ... Cells also contain the body's hereditary material and can make copies of themselves. Cells have many parts, each with a different function. Some of these parts, called organelles, are specialized structures that perform certain tasks within the cell.
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