A.Presence of gill slits in embryos
B.Presence of excretory organs in earthworm and frog
C.Presence of legs in mammals and arthropod
D.Presence of wings in all insects
A.Presence of gill slits in embryos
B.Presence of excretory organs in earthworm and frog
C.Presence of legs in mammals and arthropod
D.Presence of wings in all insects