Choose correct sentence.

Hindi

12.Ecosystem

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Choose correct sentence.

Except for the deep sea hydro - thermal ecosystem, sun is the only source of energy for all ecosystems on earth of the incident solar radiation more than 50 percent of it is photo synthetically active radiation (PAR).

Plant capture only $10-20$ percent of the PAR and this small amount of energy sustains the entire living world.

All organisms are dependent for their food on producers.

Primary producers in an aquatic ecosystem are zooplanktons.

Solution

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Standard 12

Biology

The primary consumers in a pond ecosystem are

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The amount of stored energy is highest in ………

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Herbivores are called

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The organisms, which attack dead animals are

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Which of the following are the essential sources for releasing in the atmosphere?

$I.$ Burning of wood

$II.$ Volcanic activity

$III.$ Combustion of organic matter

$IV.$ Fossil fuels

Choose the correct option

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