What is the correct sequence of embryonic development
Answers
Answer:
Explanation:
Development of embryo
During initial stage the development of ovule primary archesporial cell get demarcated at the apex of the nucleus below the epidermis .
It divides preclinically into an outer primary parietal cell. The latter acts as a mother cell.
The latter greatly enlarges and forms the embryo sac.
Functional megaspore enlarge in size , it's nucleus divides and the two daughter nuclei move to the two poles this forms the results of eight nuclei .
The embryo increase in size and then 1 nucleus from each end passes inwards towards the centre forming the secondary nucleus. The 3 nuclei if the micropylar end become surrounded by a very thin wall and constitute the egg apparatus .
The egg cell on fertilization , one is the female egg called egg cell and the other 2 are called synergies. The egg cell on fertilization give rise to embryo.
The synergids and the antipodal cells disorganized sooner or later .
The secondary nucleus after fertilization gives rise to endosperm