Have the proteins of a family generally acquired distinctive properties within each of these three kingdoms for ancient families that arose before bacteria, archaea and eukaryotes diverged?

1091

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Does multidrug resistance (mdr) arise by activation of stable genes encoding drug efflux pumps or by mutations of genes encoding other types of transporters in bacterial pathogens?

1137

---

What are the main types of waste?

302

---

Why transgenics are considered a threat to the environmental safety?

249

---

What are the main characteristics of the age pyramids of developed countries?

328

---

What is pollution?

452

---

What is harmonious ecological interaction?

331

---

What is the relation between environmental resistance and the population growth according to the biotic potential curve and the real population growth curve?

472

---

What is a population?

330

---

What is commensalism?

331

---

What is nuclear pollution?

346

---

What are the major terrestrial biomes?

300

---

What are plankton, nekton, and benthos?

313

---

What are the main chemical compounds that destroy the ozone layer?

399

---

What is parasitism?

344

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