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

Options

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

Answer

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

### Step 1: Understand the Options
We have four options to consider:
1. Adventive embryony
2. Polyembryony
3. Parthenocarpy
4. Parthenogenesis

### Step 2: Define Each Term
- **Adventive embryony**: This refers to the development of an embryo from diploid sporophytic cells of the ovule, which does not involve fertilization of the ovum.

- **Polyembryony**: This is the formation of multiple embryos from a single ovum, which involves fertilization.

- **Parthenocarpy**: This is the development of fruit without fertilization. It does not involve the development of a complete organism.

- **Parthenogenesis**: This is the development of a complete organism from an unfertilized ovum, meaning no fertilization is involved.

### Step 3: Identify the Correct Answer
From the definitions:
- **Adventive embryony** and **parthenocarpy** do not refer to the development of a complete organism.
- **Polyembryony** involves fertilization.
- **Parthenogenesis** specifically refers to the development of an organism without fertilization.

Thus, the correct answer is **Parthenogenesis**.

### Final Answer
The phenomenon of development of an organism without fertilization of the ovum is known as **Parthenogenesis**.

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