A trait common in Leech and Mosquito is

Options

A. anticoagulants
B. abundant asexual reproduction
C. cellular level of organisation
D. absence of sexual phase

Answer

To determine a common trait between leeches and mosquitoes, we can analyze the provided options step by step.

### Step-by-Step Solution:

1. **Identify the Options**: The options provided are:
- A) Anticoagulants
- B) Abandoned asexual reproduction
- C) Cellular level of organization
- D) Absence of sexual phase

2. **Evaluate Each Option**:
- **Option A: Anticoagulants**:
- Both leeches and mosquitoes are known to secrete anticoagulants. Leeches produce a substance called hirudin, which prevents blood from clotting. Similarly, mosquitoes inject anticoagulants through their saliva to keep the blood flowing while they feed.
- **Conclusion**: This option is correct as it is a common trait.

- **Option B: Abandoned asexual reproduction**:
- Leeches primarily reproduce sexually and are hermaphrodites, meaning they have both male and female reproductive organs. Mosquitoes also reproduce sexually, and they have both asexual and sexual phases in their life cycle.
- **Conclusion**: This option is incorrect.

- **Option C: Cellular level of organization**:
- Both leeches and mosquitoes have an organ level of organization, not merely a cellular level. This means their bodies are organized into tissues and organs that perform specific functions.
- **Conclusion**: This option is incorrect.

- **Option D: Absence of sexual phase**:
- Both leeches and mosquitoes have sexual phases in their life cycles. Leeches reproduce sexually, and mosquitoes have distinct sexual reproduction phases.
- **Conclusion**: This option is incorrect.

3. **Final Answer**: The common trait between leeches and mosquitoes is **Anticoagulants** (Option A).