Question

what occurs during embryonic development?
the mothers body begins to form the embryo
the embryo grows hair and nails
the major organ systems begin to form
the embryo develops the ability to speak
the embryo develops the ability to fly

Explanation:

During embryonic development, major organ systems begin to form. The mother's body does not form the embryo (the embryo is formed from the fertilized egg). Hair and nails develop later in fetal development. Embryos do not develop the ability to speak or fly.

Answer:

The major organ systems begin to form.