Name the types of blastula present in following animals:
(i) Amphioxus (ii) Reptiles birds and prototherian mammals
(iii) Insects (iv) Annelids ,Molluscs

Explanation

To answer the question regarding the types of blastula present in various animals, we will categorize the animals mentioned and identify the type of blastula associated with each group.

### Step-by-Step Solution:

1. **Identify the type of blastula in Amphioxus:**
- Amphioxus is known to have a **coeloblastula**. This type of blastula has a blastocoel (the fluid-filled cavity) surrounded by a single layer of blastoderm cells.

2. **Identify the type of blastula in Reptiles, Birds, and Prototherian Mammals:**
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