what is the common type of genetic material of phytophagineae?

Options

A. ds RNA
B. ss DNA
C. ds DNA
D. ssRNA

Answer

### Step-by-Step Solution:

1. **Understanding Phytophagiae**:
- Phytophagiae refers to a family of viruses known as plant parasitic viruses. They are known to cause diseases in plants.

2. **Identifying the Genetic Material**:
- The question specifically asks for the common type of genetic material found in the Phytophagiae family.

3. **Recognizing the Type of Genetic Material**:
- The genetic material of Phytophagiae is identified as RNA (Ribonucleic Acid).

4. **Specifying the Form of RNA**:
- It is important to note that the RNA in Phytophagiae is single-stranded RNA (ssRNA). This form is characterized by its instability, which contributes to its pathogenicity.

5. **Understanding the Impact on Plants**:
- After the virus enters the plant, it utilizes the plant's nutrients from its sap, leading to a gradual decline in the plant's health and vitality.

6. **Final Answer**:
- The common type of genetic material of Phytophagiae is single-stranded RNA (ssRNA).