In this phylogeny, the presence of the amniotic egg in mammals, birds, and reptiles is an example of .

What does natural resource management aim at ?

What material did the moon come from?

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?