Double uterus and double vagina are charateristic of

Options

A. Prototheria
B. Metatheria
C. Chiroptera
D. Cetacea.

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the characteristic of having a double uterus and double vagina in mammals.

2. **Identifying the Options**: The options provided are:
- A) Prototheria
- B) Metatheria
- C) Chiroptera
- D) Cetacea

3. **Analyzing Prototheria**:
- Prototheria includes monotremes, which are egg-laying mammals.
- Examples include the platypus.
- Monotremes do not have a double uterus or double vagina.
- **Conclusion**: Prototheria is not the correct answer.

4. **Analyzing Metatheria**:
- Metatheria includes marsupial mammals such as kangaroos and koalas.
- These mammals are known to have a double uterus and double vagina.
- During birth, a birth canal forms that connects these organs.
- **Conclusion**: Metatheria is a strong candidate for the correct answer.

5. **Analyzing Chiroptera**:
- Chiroptera consists of bats, which are the only flying mammals.
- Bats do not have a double uterus or double vagina.
- **Conclusion**: Chiroptera is not the correct answer.

6. **Analyzing Cetacea**:
- Cetacea includes aquatic mammals like dolphins and whales.
- These mammals also do not have a double uterus or double vagina.
- **Conclusion**: Cetacea is not the correct answer.

7. **Final Conclusion**: Based on the analysis, the only group that exhibits the characteristic of having a double uterus and double vagina is **Metatheria** (marsupial mammals).

**Final Answer**: Metatheria

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