Which type of blastula occurs in Frog?
(a) Steroblastula
(b) Coeloblastula
(c) Holoblastula
(d) Amphiblastula

Options

A. Steroblastula
B. Coeloblastula
C. Holoblastula
D. Amphiblastula.

Answer

To determine which type of blastula occurs in frogs, we need to analyze the options provided and understand the characteristics of each type of blastula.

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks about the type of blastula that is found in frogs. We have four options: Steroblastula, Coeloblastula, Holoblastula, and Amphiblastula.

2. **Analyzing Each Option**:
- **(a) Steroblastula**: This type of blastula does not have a fluid-filled cavity. Since frogs have a blastula with a fluid-filled cavity, this option is incorrect.

- **(b) Coeloblastula**: This type of blastula is characterized by a fluid-filled cavity. Frogs do indeed have a blastula that contains a fluid-filled cavity, making this option a strong candidate.

- **(c) Holoblastula**: A holoblastula typically has a small amount of yolk and does not contain a significant fluid-filled cavity. This does not match the characteristics of the frog's blastula, so this option is also incorrect.

- **(d) Amphiblastula**: This type of blastula is commonly found in amphibians and consists of different blastomeres. However, frogs do not possess this type of blastula, making this option incorrect as well.

3. **Conclusion**: Based on the analysis, the correct type of blastula that occurs in frogs is the **Coeloblastula**.

### Final Answer:
**(b) Coeloblastula**

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