They evolved many innovations such as specialized mouthparts, and the new ability to fly.
The Carboniferous period is the period that existed between 350 - 300 million years ago.
Some terrestrial invertebrates which are air-breathing insects, myriapods and arachnids are known to have existed in that era.
With time these insects tend to develop new features through mutations and natural selection leading to;
Natural selection is defined as the process that is used by organisms to adapt properly especially to a new environment which helps them to reproduce and survive.
Mutation is defined as the change in the genetic sequence of a chromosome.
Therefore, the terrestrial invertebrates, such as the insects of the Carboniferous evolved many innovations such as specialized mouthparts, and the new ability to fly.
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