Vegetal hemisphere of Frog's egg has

Options

A. Germinal vesicle
B. Yolk sac
C. Pigment
D. Grey creacent.

Answer

To answer the question "Vegetal hemisphere of Frog's egg has," we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure of Frog's Egg**:
- Frog eggs are divided into two distinct hemispheres: the animal hemisphere and the vegetal hemisphere.

2. **Identify the Characteristics of Each Hemisphere**:
- The **animal hemisphere** is typically darker in color due to the presence of melanin granules.
- The **vegetal hemisphere**, on the other hand, is lighter and is primarily composed of yolk.

3. **Focus on the Vegetal Hemisphere**:
- The vegetal hemisphere is rich in nutrients and contains a significant amount of yolk, which is essential for the development of the embryo.

4. **Consider the Options Provided**:
- Option A: Germinal vesicle - This is not specific to the vegetal hemisphere.
- Option B: Yolk sac - This is indeed found in the vegetal hemisphere.
- Option C: Pigment - This is more associated with the animal hemisphere.
- Option D: Gray crest - This is located between the animal and vegetal hemispheres.

5. **Conclusion**:
- Based on the characteristics of the frog's egg and the options provided, the correct answer is **Option B: Yolk sac**.