Which of the following ecosystems will be more productive in terms of primary productivity ? Justify your answer. A young forest, a natural old forest, a shallow polluted lake, alpine meadow.
In which of the following cycle, an atmospheric cycle is absent
Amount of inorganic substances present in an ecosystem is ______. Energy flow is a ______ feature of ecosystem.
The Great Barrier Reef along the east coast of Australia can be categorised as
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