What is the name of the cell that divides to form an embryo

Zygote

Explanation - Zygote is the cell that undergo cleavage and divides to form embryo. Zygote is formed when ovum (female gamete) fuses with the sperm (male gamete). Therefore, zygote contain the genetic material of both male and female. Embryo then undergoes continual division to form morula.

Morula is a 16 celled stage. Morula then develops to form blastocyst which then gets implanted to the uterus for further development. The process of development takes 9 months in women and is called as gestation period.  

igneous rocks are formed by solidification of cooled magma (molten rock), with or without crystallization, either below the surface as intrusive (plutonic) rocks or on the surface as extrusive (volcanic) rocks.  

the composition depends on the source magma. there are almost a thousand types of composition found till now.  

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