What is the water cycle?

376

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What is the primary energy source for life on earth?

356

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How are grasslands classified?

322

---

What is inharmonious ecological interaction?

283

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What is environmental resistance?

342

---

Is monoculture a system that contributes to great biological diversity of an ecosystem?

378

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Why waste is considered one of the major environmental issues?

382

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What are the three main types of tropic pyramids studied in Ecology?

320

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What are primary consumers? Can food chain present quaternary consumers without having secondary or tertiary consumers? Can a tertiary consumer of one chain be a primary or secondary consumer of another chain?

370

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Which terrestrial vertebrate group is extremely rare in deserts?

308

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In the ecological study of food interactions how are the autotrophic beings called?

313

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Can the amount of available energy in a given tropic level to be larger than the available energy in inferior tropic levels? What does that condition means to the conformation of the energy pyramids?

380

---

What are pioneer species? What is the role of the pioneer species?

397

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Why does thermal inversion increases air pollution? Which harms can thermal inversion cause to humans?

453

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What benefits can commensalism offer to a species?

306

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