Explain the main biological process that consumes carbon dioxide?

331

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Explain the main characteristics of the age pyramids of developed countries?

361

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Which harms can thermal inversion cause to humans?

283

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Can food chain present quaternary consumers without having secondary or tertiary consumers?

325

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Explain why waste is considered one of the major environmental issues?

354

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Define water cycle?

299

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Explain how do the availability of water and light and the climate affect the growth of a population?

482

---

Define a population?

358

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Why does thermal inversion increases air pollution?

312

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Define biodiversity?

297

---

Define a biodigester?

347

---

Define protocooperation?

310

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Explain the analyses provided by the study of human age pyramids?

297

---

Define an ecosystem?

247

---

Define ammensalim?

382

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