Read the following statements and identify the class of vertebrates:
This class needs to have 'moist' skin in order to breathe.
This class does not have scales.
This vertebrate class is unique because the members of this class breathe with either lungs, gills, or through the skin.
Animals in this vertebrate class lay eggs.
Members of this class have a backbone.
Animals in this class do not have claws and can have two or four legs.
These are cold blooded.
Some animals in this class are unique, as they are born with gills and then develop lungs.

Explanation

To identify the class of vertebrates based on the given statements, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the characteristics of the class**:
- The class needs to have 'moist' skin in order to breathe.
- The class does not have scales.
- Members of this class breathe with either lungs, gills, or through the skin.
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