Caulimo (Cauliflower Mosaic) viruses have

Options

A. ssRNA
B. dsRNA
C. dsDNA
D. ssDNA

Explanation

To answer the question regarding the type of genetic material that Caulimo (Cauliflower Mosaic) viruses have, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Virus**: The question refers to the Cauliflower Mosaic Virus, which is known to infect plants, particularly those in the Brassicaceae family.

2. **Understand the Options**: The options provided are:
- Single-stranded RNA
- Double-stranded RNA
- Double-stranded DNA
- Single-stranded DNA

3. **Research the Virus Structure**: The Cauliflower Mosaic Virus is known to have a specific type of genetic material. It is essential to recall or research the characteristics of this virus.

4. **Determine the Correct Genetic Material**:
- The Cauliflower Mosaic Virus contains circular double-stranded DNA. This is a key characteristic that differentiates it from other viruses.
- The viral DNA is approximately 8.0 kilobases long and has unique structural features, including nicks that are repaired after entering a host cell.

5. **Eliminate Incorrect Options**:
- Single-stranded RNA: Incorrect, as the virus does not have this type of genetic material.
- Double-stranded RNA: Incorrect, as this is not the structure of the Cauliflower Mosaic Virus.
- Single-stranded DNA: Incorrect, as this virus does not possess single-stranded DNA.

6. **Conclude the Answer**: The only correct option left is **double-stranded DNA**, which is the genetic material of the Cauliflower Mosaic Virus.

### Final Answer:
The Caulimo (Cauliflower Mosaic) viruses have **double-stranded DNA**.

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