The organisms A and B occur on the forest floor. They convert the dead parts of forest plants and dead parts of forest plants and dead bodies of forest animal into simple susbtances such as C,D and E which can be re-used by organisms F for their growth and development.
What is E ?

Answer

To solve the question step by step, we can follow this reasoning:

1. **Identify Organisms A and B**: The question mentions organisms A and B that are found on the forest floor. These organisms are likely decomposers, which include fungi and bacteria. Their role is to break down dead organic matter.

**Hint**: Think about what types of organisms are responsible for breaking down dead plants and animals in a forest ecosystem.

2. **Understanding the Process**: Organisms A and B convert dead parts of plants and animals into simpler substances. This process is known as decomposition. During decomposition, complex organic materials are broken down into simpler substances.

**Hint**: Consider what happens to dead organic matter in nature and what substances are produced as a result.

3. **Identifying the Simple Substances**: The question states that the dead parts are converted into simple substances C, D, and E. Common products of decomposition include nutrients (like nitrogen and phosphorus), carbon dioxide, and water.

**Hint**: Recall the basic products of decomposition and think about what is essential for plant growth.

4. **Determining Substance E**: Among the products of decomposition, one of the key substances that is essential for plants is water. Plants need water for photosynthesis and other metabolic processes.

**Hint**: Consider which of the substances produced during decomposition is vital for the growth and development of plants.

5. **Conclusion**: Based on the above reasoning, we conclude that substance E is water.

**Final Answer**: E is water.