Select the correct statement.

Options

A. Sweet potato and potato are modified for storage.
B. Eyes of octopus and mammals are examples of homologous organs.
C. Resistance in microbes against certain antibiotics is an example of adaptive radiation.
D. The inheritance of acquired characters and natural selection are the two key concepts of Darwinian theory of evolution

Answer

To solve the question "Select the correct statement," we will analyze each of the provided statements one by one.

### Step-by-Step Solution:

1. **Analyze the first statement**:
- **Statement**: "Sweet potato and potato are modified for storage. Sweet potato is root modification and potato is stem modification."
- **Explanation**: Sweet potato is indeed a modified root (storage root), while potato is a modified stem (tuber). Both serve the function of storing nutrients. Therefore, this statement is **correct**.

2. **Analyze the second statement**:
- **Statement**: "Eye of octopus and mammals are examples of homologous organs."
- **Explanation**: Homologous organs have the same structure but different functions, while analogous organs have different structures but the same function. The eyes of octopus and mammals serve the same function (vision) but have different structures, making them analogous, not homologous. Thus, this statement is **incorrect**.

3. **Analyze the third statement**:
- **Statement**: "Resistance in microbes against certain antibiotics is an example of adaptive radiation."
- **Explanation**: Resistance in microbes is a result of natural selection, where only the resistant microbes survive and reproduce. Adaptive radiation refers to the diversification of a group of organisms into forms filling different ecological niches. Therefore, this statement is **incorrect**.

4. **Analyze the fourth statement**:
- **Statement**: "Inheritance of acquired characters and natural selection are two key concepts of Darwinian theory of evolution."
- **Explanation**: Darwin's theory is primarily based on natural selection. The concept of inheritance of acquired characteristics was proposed by Lamarck, not Darwin. Therefore, this statement is also **incorrect**.

### Conclusion:
The only correct statement is the first one regarding sweet potato and potato being modified for storage.

### Final Answer:
**The correct statement is: "Sweet potato and potato are modified for storage. Sweet potato is root modification and potato is stem modification."**

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