3 razones de la importancia del funcionamiento correcto del sistema endocrino

Use the drop down menus to match each example to the fossil topic discussed then to show how the fossil record gives evidence of evolution

What processes take place before the mature mrna exits the nucleus?

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?