What is the typical conformation of the age pyramids of underdeveloped countries?

305

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Does thermal inversion occur in the winter or in the summer?

309

---

What are the phytoplankton and the zooplankton?

386

---

What is the difference between primary ecological succession and secondary ecological succession?

311

---

What are the main limiting factors for the growth of a population?

345

---

What is a community? What is the difference between the concepts of community and population?

354

---

What are the processes that autotrophic beings use to produce organic material from inorganic substances?

356

---

What are biogeochemical cycles?

355

---

What are the analyses provided by the study of human age pyramids?

515

---

What is the main biological process that consumes carbon dioxide?

476

---

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

391

---

What is the nitrogen cycle?

359

---

What are the typical vegetation and the typical fauna of the temperate forests?

473

---

What are tropic levels? How many tropic levels can a food chain have?

537

---

How is energy transferred along a food chain?

303

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