Слайд 2theory of phylembryogenesis-deviation
a systematic co-ordination of ontogenetic and phylogenetic developements of morphological
characters
deviation is nothing else then a change in the characters then the normal ontogeny
deviation generally occur in intermediate stages of ontogenesis
Слайд 3the idea initiated by:-
a theory put forth by Russian palaeontologist Severtsov postulating
that phylogenetic changes in organisms are conditioned by ontogenetic alterations in that certain events are added modified added or deleted in the development of an embryo based on the events of ancestral development.
Слайд 6phylum chordata
who are classified in chordata phylum
Слайд 7embryo description of vertebrates
Слайд 8nervous system of animalia:-
Слайд 9developement of brain in hominidae:-
Слайд 12neural tube formation and development:-
Слайд 14anomalies of nervous system in human