The placenta is attached to the developing seed near hilum. It is the scar located near the edge where seed breaks from stalf of funicules i.e., connecting the seed with fruit wall and placenta.

Placenta Attachment in Developing Seed

The placenta is a specialized tissue that connects the developing embryo to the maternal tissue for the exchange of nutrients, oxygen, and waste products. It is a crucial structure for the proper development of the embryo and plays a significant role in pregnancy.

The developing seed is the structure that contains the embryo and the food reserves necessary for the germination and growth of the plant. The placenta is attached to the developing seed near the hilum, which is a small scar on the surface of the seed.

Explanation of the Options

a) Testa - The testa is the outermost layer of the seed that protects the embryo and the food reserves from the external environment. It is not the site of placenta attachment.

b) Chalaza - The chalaza is a structure that anchors the embryo sac to the ovule wall. It is not the site of placenta attachment.

c) Micropyle - The micropyle is a small opening in the testa that allows the entry of water and air into the seed during germination. It is not the site of placenta attachment.

d) Hilum - The hilum is a small scar on the surface of the seed that marks the site of attachment of the seed to the ovary wall. It is the site of placenta attachment.

Conclusion

In conclusion, the placenta is attached to the developing seed near the hilum, which is a small scar on the surface of the seed. The placenta plays a crucial role in the development of the embryo and the proper functioning of the pregnancy.