In our biosphere diversity exists at the level of

Options

A. species only
B. macromolecular level
C. cellular level
D. all of these

Answer

To solve the question regarding the levels at which diversity exists in our biosphere, we can break down the options and analyze each one step by step.

### Step 1: Understanding the Levels of Diversity
The question asks about the levels of diversity in the biosphere. The options provided are:
1. Species level
2. Macromolecular level
3. Cellular level
4. All of these

### Step 2: Analyzing Species Level
Diversity at the species level refers to the variety of different species that exist in various habitats. For example, different species of amphibians can be found in different geographical locations, such as the Eastern and Western Ghats. This indicates that species diversity is indeed a significant aspect of biodiversity.

**Hint:** Consider how many different species exist in various environments and their adaptations.

### Step 3: Analyzing Macromolecular Level
The macromolecular level refers to the diversity of large molecules, such as proteins, nucleic acids, carbohydrates, and lipids. Different organisms have different compositions of these macromolecules, which contribute to their unique characteristics and functions. Thus, diversity also exists at this level.

**Hint:** Think about how different organisms utilize various macromolecules for their biological functions.

### Step 4: Analyzing Cellular Level
Diversity at the cellular level includes the variety of cell types and structures found in organisms. This encompasses single-celled organisms (like bacteria and protozoa) and multicellular organisms (like plants and animals), which have specialized cells for different functions. Therefore, cellular diversity is another important aspect of biodiversity.

**Hint:** Reflect on how different organisms have evolved various cell types to perform specific functions.

### Step 5: Conclusion
Since diversity exists at all three levels mentioned (species, macromolecular, and cellular), we can conclude that the correct answer is "all of these." Each level contributes to the overall biodiversity of the biosphere.

### Final Answer
The correct option is: **All of these.**