During prenatal development the begins to differentiate into the cells of the ectoderm, mesoderm, and endoderm?

During prenatal development, the zygote begins to differentiate into the cells of the ectoderm, mesoderm, and endoderm. 
A zygote refers to a cell in humans or animals/plants, which is fertilized and will at one point create a new human, animal, or plant. Once a female ovum and a male sperm cell join, a zygote is created which will then grow, and differentiate, until a new organism is born.

This is what i found on google“ the monomers combine with each other via covalent bonds to form larger molecules known as polymers. in doing so, monomers release water molecules as byproducts. this type of reaction is known as dehydration synthesis, which means “to put together while losing water. in the process, a water molecule is formed.” i hope this you