50 years ago polyface farm would have supported how many cows? now it supports how many cows ?

In what way are cities microclimates?

What type of competition exsist between two species. turtles and fish

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