How does net primary production relate to the energy pyramids?

465

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What are colonies?

406

---

What is plankton?

511

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Explain why transgenics are considered a threat to the environmental safety?

301

---

What are interspecific ecological interactions?

434

---

Explain the main chemical compounds that destroy the ozone layer?

318

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

328

---

Explain the main causes of the loss of the biological diversity nowadays?

333

---

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

451

---

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?

334

---

Explain the primary energy source for life on earth?

360

---

What is the typical vegetation of the tropical forests?

376

---

What are primary consumers?

436

---

Explain how are grasslands classified?

392

---

What are societies?

328

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