Final answer:
Snakes are carnivorous reptiles that have descended from either burrowing or aquatic lizards over 100 million years ago. They range in size from small thread snakes to large pythons and anacondas. Snakes are found on every continent except Antarctica and eat small animals, birds, eggs, fish, and insects.
Step-by-step explanation:
Snakes are carnivorous reptiles that have descended from either burrowing or aquatic lizards over 100 million years ago. They range in size from small thread snakes to large pythons and anacondas. Snakes are found on every continent except Antarctica and eat small animals, birds, eggs, fish, and insects.