In two or more complete sentences describe how a dam placed in a river can act as both a constructive and destructive force.

Ihave no idea how to solve these. plus there's another question that is 2) a 10 kilogram meteorite is collected in space and brought back to earth. it is composed of 1.25 kg of uranium-238 and 8.75 kg of lead-206. how many u-238 half lives have passed? what is the approximate age of the meteorite?

How would you expect the mrna codons that code for the amino acids that make up hemoglobin to compare between humans

Which characteristic should describe all evidence collected by a scientist? true obvious objective subjective