Question

definition of placentation and types of placentation?

Answer 1

The formation of placenta in the ovary of a flower i s known as plancentation.
Its types are basal placentation , apical plancentation, parietal placentation, etc.

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Answer 2

The arrangement of placentas in flowers is known as placentation....

Its types are--


Basal placentation: The placenta is at the base (bottom) of the ovary. Simple or compound carpel.

Apical placentation: The placenta is at the apex (top) of the ovary. Simple or compound carpel.

Parietal placentation: The placentas are in the ovary wall within a non-sectioned ovary. Compound carpel.

Axile placentation: The ovary is sectioned by radial spokes with placentas in separate locules. Compound carpel.

Free or central placentation: The placentas are in a central column within a non-sectioned ovary. Compound carpel.

Marginal placentation: There is only one elongated placenta on one side of the ovary, as ovules are attached at the fusion line of the carpel's margins . This is conspicuous in legumes. Simple carpel.

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