The Environmental Protection Agency uses fish species in the Chesapeake Bay as indicator species, why do you think the EPA would do that?

Guard cells control which event? the growth of plants capture of solar energy gas exchange in leaves water absorption in roots

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

Can create a hboth of these instruments can measure wind speed. doppler radar and psychrometer anemometer and hygrometer doppler radar and anemometer radiosonde and psychrometer