Question

is a embryo is made up of single cell?

Answer 1

An embryo is an early stage of developmentof a multicellular diploid eukaryotic organism. In general, in organisms that reproduce sexually, an embryo develops from a zygote, the single cell resulting from the fertilizationof the female egg cell by the male sperm cell. The zygote possesses half the DNA from each of its two parents. In plants, animals, and some protists, the zygote will begin to divide by mitosis to produce a multicellular organism. The result of this process is an embryo.
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Answer 2

Bonjour!

Zygote is made up of single cell and a stage when zygote divides into many cell it is known as embryo. So, it is not made up of single cell.