The term eumitosis is used for

Options

A. Mitosis is higher plants
B. Mitosis in animals
C. Mitosis where spindle is extranuclear
D. Mitosis with intranuclear spindle

Answer

To answer the question "The term eumitosis is used for," we can follow these steps:

### Step 1: Understand the Definition of Eumitosis
Eumitosis refers to a specific type of mitosis characterized by the formation of the spindle apparatus outside the nuclear membrane.

### Step 2: Identify the Characteristics of Eumitosis
In eumitosis:
- The nuclear membrane dissolves during the prometaphase stage of cell division.
- The spindle fibers are formed in the cytoplasm, making it an "extracellular" process.

### Step 3: Differentiate Between Eumitosis and Other Types of Mitosis
Eumitosis is often referred to as "open mitosis" because the nuclear envelope breaks down, allowing the spindle fibers to interact with the chromosomes directly in the cytoplasm. In contrast, "closed mitosis" occurs when the spindle apparatus forms within the confines of the nuclear envelope.

### Step 4: Analyze the Options Given in the Question
1. **Mitosis in higher plants** - This is incorrect as there is no specific term for mitosis in higher plants that is called eumitosis.
2. **Mitosis in animals** - This is also incorrect as it does not specifically refer to eumitosis.
3. **Mitosis where spindle is extra nuclear** - This is correct as it aligns with the definition of eumitosis.
4. **Mitosis with intra nuclear spindle** - This is incorrect as it describes closed mitosis.

### Step 5: Conclude the Correct Answer
Based on the analysis, the correct answer is that eumitosis refers to "mitosis where spindle is extra nuclear."

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