Presence of massive yolk at one end maks the egg

Options

A. Telolecithal
B. Mesolecithal
C. Centrolecithal
D. Oligolecithal.

Answer

To solve the question regarding the type of egg characterized by the presence of massive yolk at one end, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks about the type of egg that has a significant amount of yolk concentrated at one end.

2. **Define Key Terms**:
- **Telolecithal**: Eggs that have a large amount of yolk concentrated at one pole.
- **Mesolecithal**: Eggs with a moderate amount of yolk distributed more evenly.
- **Centrolecithal**: Eggs with yolk located in the center.
- **Oligolecithal**: Eggs with a small amount of yolk, evenly distributed.

3. **Analyze the Options**:
- **Option A: Telolecithal** - This option describes eggs with a large yolk at one end.
- **Option B: Mesolecithal** - This option describes eggs with a moderate yolk distribution.
- **Option C: Centrolecithal** - This option describes eggs with yolk in the center.
- **Option D: Oligolecithal** - This option describes eggs with minimal yolk.

4. **Match the Description**: Since the question specifies "massive yolk at one end," this aligns perfectly with the definition of telolecithal eggs.

5. **Conclude the Answer**: Based on the definitions and the analysis, the correct answer is **Option A: Telolecithal**.

### Final Answer:
**Option A: Telolecithal**

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