How to explain the difference between living and once living things to second grade students

http://www.internet4classrooms.com/skills_2nd_science.htm

Dear sir/mam,
I completed my post graduation in biotechnology and I was interested in doing phd in biotechnology.So could you please give me information about this program i.e. How to apply for universites, how much score do they require, i.e. in toefl and gre, which universities are good for biotechnology.