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Which of the following ecosystem types has the highest annual net primary productivity?

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Which of the following ecosystem types has the highest annual net primary productivity?

 (a) Tropical rain forest

 (b) Tropical deciduous forest

 (c) Temperate evergreen forest

 (d) Temperate deciduous forest

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Correct option (a) Tropical rain forest

 Explanation:

 Productivity of tropical rain forest is highest. The tropical rain forest cover 300,000 km2 area. They contain more than 50% of total flora and fauna of the world.

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