Question

Describe the various types of placentations found in flowering plants.

Answer 1

Hint: Flowering plants, which are also known as angiosperms, use a sexual method of reproduction. Reproduction in plants rotates around the flower, which has both the female and the male gametes. All parts of a flower help in the process of reproduction, even though some of them are sterile.

Complete step-by-step answer:
Placentation indicates the structure, kind, formation and or arrangement of placentas. The area of the ovary wall in which the ovules are connected in a flower is known as the placenta. Several kinds of placentations found in flowering plants are
Marginal placentation The placenta makes a ridge along through the ventral suture of the ovary, ovules are borne on the ridge to form two rows. Example: Pea

Axile placentation The placenta is axial, and ovules are connected to it in a multilocular ovary. Example: Lemon

Parietal placentation Ovules evolve on the peripheral or on the inner wall of the ovary. It is single-chambered, but because of the development of a false septum, it turns into two-chambered. Example: Mustard

Basal placentation The placenta evolves at the base of the ovary in which a single ovule is connected to it. Example: Marigold

Free central placentation On the middle axis ovules are borne and septa are not present. Example: Primrose

Image:Placentation Types

Note: Placentation is the layout of ovules in the ovary of a plant. The function of placentation is to transmit respiratory gases, nutrients, and water from maternal tissue to a growing embryo, and in certain cases to eliminate waste from the embryo.