Fungicides and antibiotics are chemicals that

Options

A. enhance yield and disease resistance
B. kill pathogenic fungi and becteria, respetively
C. kill all pathogenic microbes
D. kill pathogenic bacteria and fungi respectively.

Answer

To solve the question regarding fungicides and antibiotics, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Fungicides**:
- Fungicides are chemicals specifically designed to kill fungi. They target fungal pathogens that can cause diseases in plants.

2. **Understanding Antibiotics**:
- Antibiotics are chemicals that specifically kill bacteria. They are used to treat bacterial infections and do not affect fungi.

3. **Analyzing the Options**:
- The question presents several options regarding the role of fungicides and antibiotics:
- **Option A**: Enhance yield and disease resistance.
- **Option B**: Kill pathogenic fungi and bacteria respectively.
- **Option C**: Kill all pathogenic microbes.
- **Option D**: Kill pathogenic bacteria and fungi respectively.

4. **Evaluating Each Option**:
- **Option A**: Incorrect, as fungicides and antibiotics do not enhance yield or disease resistance directly.
- **Option B**: Correct, as fungicides kill pathogenic fungi and antibiotics kill pathogenic bacteria.
- **Option C**: Incorrect, since fungicides and antibiotics do not kill all pathogenic microbes; they are specific to fungi and bacteria, respectively.
- **Option D**: Incorrect, as it reverses the roles of fungicides and antibiotics.

5. **Final Answer**:
- Based on the analysis, the correct answer is **Option B**: Fungicides and antibiotics are chemicals that kill pathogenic fungi and bacteria respectively.