Explain what is meant by the statement, “cells are very different, yet very similar.”

How many types of rock can form from the rock cycle

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?

"your temperature analysis reveals a pattern with coldest temperatures located to the portion of the map."