Which statement is correct ?
A. Somaclonal variations are the variations observed in plants regenerated from somatic cultures.
B. A transgenic crop is one that contains and expresses a transgene.
C. Chloromycetin is obtained from Penicillium.
D. Bioprospecting is the process of discovery and commercialization of new products based on biological resources

Options

A. A, B, D
B. B, C
C. C, D
D. A, B, C, D

Answer

To determine which statement is correct among the options provided, let's analyze each statement one by one:

### Step 1: Analyze Statement A
**Statement A:** Somaclonal variations are the variations observed in plants regenerated from somatic cultures.

- **Explanation:** Somaclonal variation refers to the genetic variations that occur in plants that are regenerated from somatic tissues (non-germline tissues). This statement is accurate as it correctly describes the phenomenon of somaclonal variation.

### Step 2: Analyze Statement B
**Statement B:** A transgenic crop is one that contains and expresses a transgene.

- **Explanation:** This statement is also correct. A transgenic crop is indeed one that has been genetically modified to contain a gene (transgene) from another organism, and it expresses that gene. Therefore, this statement is valid.

### Step 3: Analyze Statement C
**Statement C:** Chloromycetin is obtained from Penicillium.

- **Explanation:** This statement is incorrect. Chloromycetin (also known as chloramphenicol) is actually derived from the bacterium *Streptomyces venezuelae*, not from the fungus *Penicillium*.

### Step 4: Analyze Statement D
**Statement D:** Bioprospecting is the process of discovery and commercialization of new products based on biological resources.

- **Explanation:** This statement is correct. Bioprospecting involves exploring biodiversity for new resources that can be developed into products, including pharmaceuticals, agricultural products, and more.

### Conclusion
After analyzing all the statements, we find that:
- **Statement A** is correct.
- **Statement B** is correct.
- **Statement C** is incorrect.
- **Statement D** is correct.

However, since the question asks for which statement is correct, we can conclude that **Statements A, B, and D are correct**, but if we need to pick one, we can select **Statement A** as it is a fundamental concept in biotechnology.

### Final Answer
The correct statement is: **A. Somaclonal variations are the variations observed in plants regenerated from somatic cultures.**

---