Embryology is the science of embryo development of organisms (from the moment of fertilization to the moment of birth or hatching from the egg shells).
Correct answer: 4
Must reply that the question is partly incorrect, as, for example, Coelenterates (and they are animals) it is difficult to imagine the "birth".
Embryology studies only part of ontogenesis - the development of the organism from the moment of fertilization to natural death.
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