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Chapter:

ecosystem

1. Correct sequence of stages of succession on a bare rock is?


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2. Primary succession is development of communities on


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3. What is re-establishment of ecosystem?


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4. In a stable ecosystem, whose inverted pyramid is not observed?


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5. The symbol given below each arrow indicates loss of energy from an ecosystem. In what form is this energy lost?
The symbol given below each arrow indicates loss of energy from an ecosystem. In what form is this energy lost?\r\n


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6. Primary succession on rocks is known as xerosere. Answer following related with xerosere.
(a) Name pioneer community.
(b) Organic acids have important roles in this succession. Justify.


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7. Primary succession takes much longer than secondary succession because it involves: