The First Snakes Evolved During the Cretaceous, from Short-Legged, Long-Bodied

question 11

Multiple Choice

The first snakes evolved during the Cretaceous, from short-legged, long-bodied ____.

• A)lizards
• B)birds
• C)crocodilians
• D)turtles
• E)amphibians

---

Definitions:

Food

Any nutritious substance that people or animals eat or drink to maintain life and growth.

Pain

A complex sensory and emotional experience associated with actual or potential tissue damage, or described in terms of such damage.

Negative Reinforcement

A behavioral principle where the removal of an unpleasant stimulus strengthens or increases the likelihood of a desired response.

Pill

A small, round, solid pharmaceutical oral dosage form of medication that can contain various active ingredients.