Herbarium consists of

Options

A. Collection of living plants
B. Collection of plant and animals specimens preserved in the containers
C. Preserved insects in boxes after collecting killing and pinning
D. Herbarium sheets carrying dried, pressed and preserved plant specimens on them

Answer

### Step-by-Step Solution:

1. **Understanding Herbarium**: A herbarium is a collection that is specifically focused on plant specimens. It serves as a reference for botanists and researchers.

2. **Identifying the Components**: The herbarium consists of herbarium sheets, which are sheets of paper that carry dried, pressed, and preserved plant specimens.

3. **Characteristics of Herbarium Sheets**: These sheets are prepared by flattening and drying the plant specimens, and they are mounted in a uniform manner for easy study and reference.

4. **Purpose of a Herbarium**: The primary purpose of a herbarium is for education and research. It provides a valuable resource for studying plant diversity, taxonomy, and ecology.

5. **Evaluating the Options**:
- **Option 1**: Collection of living plants - This refers to a botanical garden, not a herbarium.
- **Option 2**: Collection of plant and animal specimens preserved in containers - This describes a museum.
- **Option 3**: Preserved insects and porpoises after collecting, killing, and pinning - This also pertains to a museum.
- **Option 4**: Herbarium sheets carrying dry pressed and preserved plant specimens - This accurately describes what a herbarium consists of.

6. **Conclusion**: Based on the evaluation, the correct answer is that a herbarium consists of herbarium sheets carrying dried, pressed, and preserved plant specimens.

### Final Answer:
**Herbarium consists of herbarium sheets carrying dried, pressed, and preserved plant specimens on them.**

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