Question

What happens during embryogenesis?​

Answer 1

Answer:

Embryogenesis is the development of a fertilized egg thatoccurs early on in pregnancy. After a sperm fuses with an egg, many changes occur in a specific order. The cells divide, reorganize and form layers of tissue that will eventually develop into specific organs.

Answer 2

Embryogenesis

• Multicellular structure developed from the zygote is called embryo.

• Embryo is the most important part of the seed.

• It is diploid.

• In angiosperms the zygote is divided by a transverse wall t form an upper and lower cells.

• The upper cell is seen towards the micropylar and the lower cell towards the chalazal end.

• Upper cell also calledhypobasal or basal cell lower cell is called epibasal or terminal cell.

• This two celled stage is called two celled pro embryo.

• The lower terminal cell divides and redivides to form embryo proper.

• Embryo proper form the multicellular embryo.

• The upper basal cell divides to form a filament called suspensor.

• The syspensor pushes the developing embryo into the endosperm, helping the embryo to absorb nutrients from the endosperm.

• The mature embryo consist of a short axis with one or two cotyledons.

• The embryo of monocots plant has only one cotyledon and that of dicot plant has two cotyledons.

• The apical end of the axis called plumule it gives rise to shoot system.

• Basal end is called radicle it give rise to root system.