Which of the following statements is false ?

Options

A. Tissues exist within organs which exist within organ systems .
B. Communities exist within populations which exist within ecosystems.
C. Organelles exist within cells which exist within tissues.
D. Communities exist within ecosystems which exist in the biosphere.

Answer

To determine which statement is false, we will analyze each statement based on biological hierarchy and organization.

### Step-by-Step Solution:

1. **Understanding Biological Hierarchy**:
- Biological hierarchy refers to the organization of living things from the smallest unit (cells) to the largest (biosphere).

2. **Analyzing the Statements**:
- **Statement 1**: "Tissues exist within organs which exist within organ systems."
- This statement is true. Tissues are groups of similar cells that perform a specific function, organs are made up of tissues, and organ systems are made up of multiple organs.

- **Statement 2**: "Communities exist within populations which exist within ecosystems."
- This statement is false. In biological terms, populations consist of individuals of the same species, and communities are made up of different populations. Therefore, communities do not exist within populations; rather, populations exist within communities.

- **Statement 3**: "Organelles exist within cells which exist within tissues."
- This statement is true. Organelles are specialized structures within cells, and cells group together to form tissues.

- **Statement 4**: "Communities exist within ecosystems which exist in the biosphere."
- This statement is true. Ecosystems consist of communities of organisms interacting with their environment, and ecosystems collectively make up the biosphere.

3. **Identifying the False Statement**:
- After analyzing all statements, we find that **Statement 2** is the false statement.

### Conclusion:
The false statement is: **"Communities exist within populations which exist within ecosystems."**

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