Some bacteria are able to grow in streptomycin containing medium due to `:`

Options

A. Natural selection
B. Induced mutation
C. Reproductive isolation
D. Genetic drift

Answer

**Step-by-Step Solution:**

1. **Understanding the Context of the Question:**
- The question states that some bacteria can grow in a medium containing streptomycin, which is an antibiotic. This implies that these bacteria have some form of resistance to the antibiotic.

2. **Identifying the Mechanism of Resistance:**
- The ability of bacteria to survive in the presence of streptomycin suggests that they have developed a resistance mechanism. This resistance is often due to genetic changes within the bacteria.

3. **Explaining Natural Selection:**
- The process by which these bacteria develop resistance is known as natural selection. In a population of bacteria, random mutations may occur. Some of these mutations may confer resistance to streptomycin.

4. **Mechanism of Natural Selection:**
- When bacteria are exposed to streptomycin, those with mutations that provide resistance will survive and reproduce, while those without the mutations will be killed by the antibiotic. Over time, the resistant bacteria will become more prevalent in the population.

5. **Conclusion:**
- Therefore, the correct answer to the question is that some bacteria are able to grow in streptomycin containing medium due to the development of resistance through the process of natural selection.

**Final Answer:**
Some bacteria are able to grow in streptomycin containing medium due to the development of resistance through natural selection.

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