Question

what is inteugments in ovules and what is caruncle in castor bean tell me ASAP!​

Answer 1

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Integuments, micropyle and chalaza

An integument is a protective layer of cells surrounding the ovule. 

Gymnosperms have one whereas Angiosperms have two integuments.

The caruncle, also called elaiosome, is an external structure that covers the micropylar region in the seed of species belonging to the Euphorbiaceae Family.

Answer 2

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${\bold{\underline{{ Description \:of \: Inteugments \: :}}}}$

Inteugments is a protective layer of cells surrounding the ovule. It developed in seed coat when ovules mature after Fertilization.

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${\bold{\underline{{ Types \:of \: Inteugments \: :}}}}$

1. Inner inteugments :- It is responsible for nourishes the developing embryo sac in ovule.

2. Outer inteugments :- This inteugment and nucleus posseses Cuticle which is responsible for Solute transportation and protection against Pests.

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${\bold{\underline{{ Case \:of \: Castor\:Bean \: :}}}}$

In Castor Beans the inteugments cells proliferate at the mycropylar region and forms a new structure called Caruncle which helps in seed dispersion.

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