When a gamete without any fusion develops into a new organism the phenomenon is called:

Options

A. Syngamy
B. External fertilization
C. Parthenogenesis
D. Parthenocarpy

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the phenomenon where a gamete develops into a new organism without any fusion. This indicates a type of reproduction that does not involve the typical fertilization process.

2. **Identifying Key Terms**:
- **Gamete**: A reproductive cell (sperm or egg).
- **Fusion**: The process where two gametes combine to form a zygote.
- **Phenomenon**: A notable event or process in biology.

3. **Analyzing the Options**:
- **Syngamy**: This refers to the fusion of two gametes. Since the question specifies "without any fusion," this option is incorrect.
- **External Fertilization**: This is the process where fertilization occurs outside the body. It still involves the fusion of gametes, so this option is also incorrect.
- **Parthenogenesis**: This is a form of asexual reproduction where an egg develops into a new organism without fertilization. This fits the description given in the question.
- **Parthenocarpy**: This refers to the development of fruit without fertilization, resulting in seedless fruits. It is not related to the development of a new organism from a gamete.

4. **Conclusion**: The correct answer is **Parthenogenesis**, as it describes the development of a new organism from a gamete without fusion.

**Final Answer**: Parthenogenesis

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