What is the most abundant form under which nitrogen is found in nature?

283

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What is ecological succession?

319

---

Which is the autotrophic group responsible for the production of most part of the molecular oxygen of earth?

578

---

Into which type of energy is the light used in photosynthesis transformed.

293

---

In a numeric pyramid to which tropic level does the base always refer?

302

---

Why is leguminous crop rotation used in agriculture?

401

---

How can the abundance and diversity of living beings in the tropical forests be explained?

277

---

What are the typical vegetation and the typical fauna of the deserts?

356

---

What are the main intraspecific ecological interactions?

456

---

What is the role of the ozone layer for the living beings?

275

---

What are the main factors that affect the growth of a population?

494

---

What are age pyramids?

385

---

How are the heterotrophic beings divided in the ecological study of food interactions?

287

---

What is the carbon cycle?

307

---

How different is the growth according to the biotic potential of a viral population from the growth according to the biotic potential of a bacterial population?

421

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