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?

1054

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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?

1098

---

What are the main types of waste?

258

---

Why transgenics are considered a threat to the environmental safety?

217

---

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

275

---

What is pollution?

411

---

What is harmonious ecological interaction?

291

---

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

429

---

What is a population?

280

---

What is commensalism?

257

---

What is nuclear pollution?

304

---

What are the major terrestrial biomes?

256

---

What are plankton, nekton, and benthos?

275

---

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

352

---

What is parasitism?

306

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