Question

What does embryogenesis mean?

Answer 1

Answer :-

Embryogenesis :-

• Embryogenesis refers to the process of development of embryo from the zygote.

• During embryogenesis, the zygote undergoes cell division (mitosis) and cell differentiation.

• Cell divisions help to increase the number of cells in the developing embryo.

• Cell differentiation helps groups of cells to undergo certain modifications to give rise to certain specialised tissues and organs to form an organism.

• Animals are classified into "Oviparous" and "Viviparous" on the basis of development of the zygote i.e. they lay fertilised/unfertilised eggs or give birth to young ones.

• Because of proper embryonic care and protection, the chances of survival of young ones is greater in Viviparous organisms.

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 thezygote is divided by a transverse wall to form an upper and lower cell.

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

• The suspensor pushes the developing embryo into the endosperm.

• It helps the embryo to absorb nutrients from the endosperm.

• The mature embryo consist of ashort 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.