Identify the statement that is true about radiometric dating. choose one:

a. dating of metamorphic rock tells when the high temperatures of metamorphism cooled below the closure temperatures of the minerals involved.

b. it can be used only if some uranium is present in the rock.

c. dating of an individual sand grain in a sandstone accurately dates the sedimentary rock's formation.

d. it can begin only when the isotopes heat up enough to decay.

answer; /// the answer to the first question is (b) it began when people first deliberately seeds; /// and (d); // it gave people a steady food supple for the first time;

the most likely outcome of fewer loon territories is that hawks would increase in proportion because the benefit of victory would be greater. hawks and loons are natural rivals of resources and victories in the game, since the lakes drying up affected the loons, the hawks would be benefited from the drought.

answer; (trauma);

answer; engram;