beginning of life

1.ERD Part 4 Introduction and make a summary
2.    Briefly explain the following concepts:
       a.     Asexual - sexual reproduction
       b.    Mitosis – Meiosis
       c.    Diploid - Haploid
       d.    Gametes
       e.    Fertilization
       f.     Zygote
       g.    Syngamy
       h.    Blastocyst
       i.     Implantation
       j.     Gastrulation
       k.    Embryo - Fetus
3.    Describe fertilization process from cellular level to fetus.
4.    According on what you learned about fertilization process, when does human life begin? 
       Your answer must be objective and based on scientific evidence. Personal opinions are not allowed.