You arrive at the scene of an accident where people are panicked and yelling. Three people appear to be injured. What action will you take FIRST?

List the advantages and disadavantages of the switch from persistent chlorinated hydrocarbon pesticides (such as ddt) to nonpersistent organophosphate pesicides. have the benefits of the switch outweighed the disadvantages? explain.

The leopard frog and the pickerel frog are two closely related species. in areas where their ranges overlap, the frogs will remain separate species if they

9. the history of life on earth is recorded in