Integument

(i) It is the covering of the ovule.

(ii) It is thin, one or two layered.

(iii) Its cells are living.

(iv) Sclereids are absent.

(v) It arises from chalazal end of ovule.

(vi) It is a pre fertilised structure.

Testa

(i) It is outer covering of seed.

(ii) It is quite thick and one layered.

(iii) Its cells are dead.

(iv) Cells are rich in sclereids.

(v) It is derived from outer integument of ovule after fertilisation.

(vi) It is a post fertilised structure.