Which soil would you expect to be better developed the soil on a hillside or on a valley floor

What did the first language sound like

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

Is a measure of the different types of organisms in a community. question options: tertiary secondary primary none of the above