BAER'S LAW -
It was given by K.E. Von Baer. Von Baer was the first scientist who studied the embryology systematically.
According to it, in the embryonic development of an animal, the general characters are formed first and the special characters are formed in the last.
Karl Von baer called "Father of modern embryology".
In 1828 published "Developmental history of animal" and proposed that differentiation in eggs during development.
Afters Baer's law preformation theory derecognized.
Baer's law &
(i) During developent simple chracters firstly expressed than specific characters.
(ii) Very simple characters earlier seen than simple character.
(iii) Diffrerent species embryos are similar than these adults.