Name 2 phyla that show protostome plan.

Explanation

To answer the question about naming two phyla that show the protostome plan, we will follow these steps:

### Step-by-Step Solution:

1. **Understand Protostome Plan**:
- The protostome plan refers to a type of embryonic development where the first opening that forms during the development of the embryo becomes the mouth. This is in contrast to the deuterostome plan, where the first opening becomes the anus.

2. **Identify Key Characteristics**:
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