What is the formula of the net primary production?

402

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Explain the role of the ozone layer for the living beings?

286

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Explain some examples of interspecif competition?

347

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How does net primary production(npp) relate to the energy pyramids?

374

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Define selective waste collection?

318

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Can a tertiary consumer of one chain be a primary or secondary consumer of another chain?

292

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Explain how does biological diversity relate to the characteristics of the abiotic factors of an ecosystem?

396

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Define pollution?

279

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Explain how are the grasslands of north america and of south america respectively called?

371

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Define dry mass?

431

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What is the respective importance of water for the living beings?

359

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Define ecological succession?

360

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Explain the typical conformation of the age pyramids of underdeveloped countries?

302

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Explain how are ecological interactions classified?

287

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Define biologic control?

283

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