Which of the following is the basis of phylogenetic classification ?

Options

A. Nutrition related adaptations
B. Descent from a common origin
C. Habitat adaptations
D. Morphological similarities in the organisms

Answer

To solve the question "Which of the following is the basis of phylogenetic classification?", we will analyze each option provided and determine which one aligns with the principles of phylogenetic classification.

### Step 1: Understand Phylogenetic Classification
Phylogenetic classification is a method of organizing living organisms based on their evolutionary history and relationships. It focuses on the common ancestry of species and how they have diverged over time.

### Step 2: Analyze the Options
1. **Nutrition related adaptations**: This refers to how organisms obtain their nutrients and does not directly relate to their evolutionary relationships.

2. **Descent from a common origin**: This option emphasizes the evolutionary ancestry of organisms, which is the core principle of phylogenetic classification. It indicates that organisms are classified based on their shared common ancestors.

3. **Habitat adaptations**: This refers to how organisms adapt to their environments, which is not a basis for phylogenetic classification.

4. **Morphological similarities in the organism**: While morphological similarities can provide some insights into evolutionary relationships, phylogenetic classification primarily focuses on ancestry rather than just physical characteristics.

### Step 3: Identify the Correct Answer
Among the options, the one that best represents the basis of phylogenetic classification is **Descent from a common origin**. This is because phylogenetic classification is fundamentally about organizing organisms based on their evolutionary lineage and shared ancestry.

### Conclusion
The correct answer is **Option 2: Descent from a common origin**.

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