How many years did trilobites exist from their first appearance to their extinction
1. How many years did trilobites exist from their first appearance to their extinction?
2. In what environment(s) did Trilobites live?
3. Describe one way in which one species of Trilobites protected themselves.
4. What is the head section of a Trilobite called?
5. What happens to their skeletons as Trilobites grow?
6. What is the largest Trilobite measured at (measured in centimeters).
7. Which continents (list them), are Trilobites found on?
8. During what geologic Period did trilobites go extinct?
