Fusion of male and female pronuclei of two conjugate Paramecium is known as

Options

A. apomixis
B. capacitation
C. acrosome reaction
D. amphimixis

Answer

To solve the question regarding the fusion of male and female pronuclei of two conjugate Paramecium, we will analyze each option provided and determine the correct answer step by step.

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks for the term that describes the fusion of male and female pronuclei in two conjugate Paramecium. This process is a form of sexual reproduction in these organisms.

2. **Analyzing the Options**:
- **Option A: Apomixes**: This term refers to a type of asexual reproduction where seeds are formed without fertilization, resulting in offspring that are genetically identical to the parent. Since this does not involve the fusion of male and female nuclei, this option is incorrect.

- **Option B: Capacitation**: Capacitation is a process that sperm undergo to gain the ability to penetrate and fertilize an ovum. It does not involve the fusion of nuclei but rather prepares the sperm for fertilization. Therefore, this option is also incorrect.

- **Option C: Acrosome Reaction**: The acrosome reaction is a process that occurs when a sperm cell penetrates the protective layer of the ovum (zona pellucida). It involves the release of enzymes from the acrosome but does not refer to the fusion of male and female pronuclei. Thus, this option is incorrect as well.

- **Option D: Amphimixes**: This term refers to the fusion of two different gametes, typically a sperm and an ovum. In the context of Paramecium, it describes the fusion of male and female pronuclei during conjugation. This is the correct answer.

3. **Conclusion**: After analyzing all the options, the correct answer to the question is **Amphimixes**.

### Final Answer:
The fusion of male and female pronuclei of two conjugate Paramecium is known as **Amphimixes**.