"Embryo: The developing individual between the union of the germ cells and the completion of the organs which characterize its body when it becomes a separate organism.... At the moment the sperm cell of the human male meets the ovum of the female and the union results in a fertilized ovum (zygote), a new life has begun.... The term embryo covers the several stages of early development from conception to the ninth or tenth week of life."
[Considine, Douglas (ed.). Van Nostrand's Scientific Encyclopedia. 5th edition. New York: Van Nostrand Reinhold Company, 1976, p. 943]
This quote does not claim the zygote is a living human.
Nothing in the rest of your list gives and explanation of why or how they came to their conclusions nor do they bother to refute claims to the contrary.
As such these are "Naked Claims". Science does not work that way. Science backs up its claims. All you have done is made a fallacious appeal to authority.
Here is what Biology - The Domain Science has to say.
https://www.franklincollege.edu/science_courses/bioethics/When%20does%20human%20life%20begin.pdfThe question of "when does human life begin" is addressed. 5 main perspectives are discussed giving arguments for and against each perspective.
The Genetic perspective agrees that human life begins at conception. The other 4 do not.