The phenomenon of development of organism without fertilization of ovum is known as

Options

A. adventitive embryony
B. polyembryony.
C. parthenocarpy
D. parthenogenesis

Answer

To solve the question regarding the phenomenon of development of an organism without the fertilization of an ovum, we can analyze the options provided:

1. **Adventive embryonic**: This term refers to embryonic development that occurs without fertilization. However, it is not commonly used in the context of organisms developing from an unfertilized ovum.

2. **Polyembryony**: This is the occurrence of more than one embryo developing from a single fertilized ovum. It does not pertain to development without fertilization.

3. **Parthenocarpy**: This term refers to the development of fruit without fertilization. It is related to plants and does not describe the development of an organism.

4. **Parthenogenesis**: This is the correct term for the phenomenon where an egg develops into an embryo without being fertilized by sperm. In parthenogenesis, the organism can develop from an unfertilized ovum.

After analyzing the options, the correct answer is **Parthenogenesis**.

### Step-by-Step Solution:
1. **Identify the question**: The question asks for the phenomenon of development without fertilization.
2. **Analyze the options**: Look at each option and determine its meaning.
- Adventive embryonic: Related to embryonic development without fertilization but not commonly used.
- Polyembryony: Refers to multiple embryos from one fertilized ovum.
- Parthenocarpy: Development of fruit without fertilization.
- Parthenogenesis: Development of an organism from an unfertilized egg.
3. **Select the correct option**: Based on the definitions, parthenogenesis is the only option that fits the description of developing an organism without fertilization.
4. **Conclude**: The correct answer is Parthenogenesis.