Name the group and animal acting as connecting link between non-chordates and chordates.

Explanation

To answer the question about the group and animal that acts as a connecting link between non-chordates and chordates, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Groups**: Start by understanding the two major groups in question: non-chordates and chordates. Non-chordates are animals that do not possess a notochord, while chordates are characterized by the presence of a notochord at some stage of their development.

2. **Determine the Connecting Link**: The animal that serves as a connecting link between these two groups is known as a transitional or connecting species.

...