Individual development of an organism Flashcards
what is ontogenesis?
the individual development of an organism including the total combination of the successive, morphological, physiological, biochemical transformations from fertilization till death.
Who suggested the term?
E Haekel, a German scientist in the year 1866
Ontogenesis is divided into?
Embryonic and post embryonic development
Post embryonic period
This is the period of hatching out/birth to biological death.
Embryonic period is also known as?
Embryogenesis
what is embryonic period?
It is the period from formation of zygote to hatching out.
Postembryonic period is divided into
Gametogenesis
Fertilization
Sub stages of the embryonic period
Zygote Cleavage Blastula Gastrula Neurula Organogenesis
Cleavage is the division of cells in the early embryo
true or false?
True
Complicated patterns of cleavage are found in ?
Annelids, molluscs, Nematodes
what is determinate?
is the form of cleavage in most protostomes. It results in the developmental fate of the cells being set early in the embryo development
organogenesis is?
the formation of tissues and organs
Regeneration
the process of repairing tissues or organs
