Which germ layer developes first during embryonic development?

Which layer develops first during embryonic development?

What is embryonic development?

Which of the following is true regarding the first germinal layer to differentiate during embryonic development ?

The first phase of embryonic development is

The first phase of embryonic development is:

Assertion :- Epithelial tissue originated first during embryonic development. Reason :- Most of bones of body are dermal.