Question : In the developmental history of mammalian heart. It is observed that it passes through a two chambered fish like heart, three chambered frog like heart and finally four chambered stage. To which hypothesis can this above cited statement be approximated?

Question : In the developmental history of mammalian heart. It is obse

1.	Question : In the developmental history of mammalian heart. It is observed that it passes through a two chambered fish like heart, three chambered frog like heart and finally four chambered stage. To which hypothesis can this above cited statement be approximated?
Answer» Lamrack's principle Mendelian principle BIOGENETIC LAW HARDY Weinberg law Solution :Biogenetic law or Recaptiulation theory was given by Ernst HAECKEL in 1866. It states that ontogeny repeasts phylogeny. Ontogeny is the life history of an ORGANISM while phylogeny is the evolutionary history of an organism while organism. This means that an organism repeats its ancestral history during its development.