One strand of DNA contains the fragment CATTGCATAAGC. What would be the complementary strand to this fragment?

In this experiment, the was intentionally manipulated. it is the independent variable. the dependent variables that were measured were the

Is there any solid scientific evidence that humans have been cloned?

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?