Where do echinoderms live? in marine environments in freshwater areas under the ground on wetland plants

2. given that most biochemical (other than coal) rocks react with hydrochloric acid, what does that tell you about organisms?

How much time has elapsed from the very beginning of "the memior of the conquistador bernal diaz del castillo" to the end? a. castillo's whole life b. a quarter of an hour c. a few weeks d. a decade

Wich is not standing in the way of astronomers getting a good view of different star