In which stage do vertebrate embryos or offspring show the most similarities?

a. earliest stages
b. middle stages
c. just before birth
d. after birth

Option B. Middle stages

Explanation:

During early stages of development, all the embryos are quite similar to each other. Embryos of different organism such as human being, fish etc. share common look alike at certain developmental stages because they all have originated from a common ancestor

However, the maximum similarity arises in the middle of embryonic development stage particularly known as phylotypic stage

Hence, option B is correct

the correct answer is option b

behavioral response need communication and thus co-ordination at several levels such as interaction among cells, organ system and the entire organism.

behavioral response produces both internal and environmental stimulus.