Which of the following is not an ex-situ conservation

Options

A. Seed banks
B. Botanical gardens
C. Cyopreservation
D. Biosphere reserves

Answer

To determine which of the following options is not an ex-situ conservation method, we first need to understand what ex-situ conservation means.

### Step-by-Step Solution:

1. **Define Ex-situ Conservation**:
- Ex-situ conservation refers to the conservation of species outside their natural habitats. This method involves protecting genetic resources and species in controlled environments.

2. **Identify the Options**:
- The options given are:
- Seed banks
- Botanical gardens
- Cryopreservation
- Biosphere reserves

3. **Analyze Each Option**:
- **Seed Banks**: These are facilities that store seeds to preserve genetic diversity. This is an ex-situ conservation method.
- **Botanical Gardens**: These are gardens dedicated to the collection, cultivation, and display of a wide range of plants. This is also an ex-situ conservation method.
- **Cryopreservation**: This technique involves storing cells, tissues, or any biological constructs at very low temperatures to preserve them. This is another ex-situ conservation method.
- **Biosphere Reserves**: These are protected areas that aim to conserve biodiversity and promote research and education. They are designed to protect natural habitats and species in their natural environment, making this an in-situ conservation method.

4. **Conclusion**:
- Among the options, **biosphere reserves** are not an ex-situ conservation method. They are focused on conserving species in their natural habitats.

### Final Answer:
**Biosphere reserves** are not an ex-situ conservation method.

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