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Describe a dicot (gram seed) with a labelled diagram.

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The gram seed is light or dark brown in colour and conical pyriform in outline. 

(i) The seed is covered by two seed coats; the outer testa and the inner tegmen. 

(ii) The hilum is a scar on the seed coat through which the developing seeds are attached to fruit. 

(iii) Above the hilum is a small pore called the micropyle. 

(iv) Within the seed coat is the embryo, consisting of an embryonal axis and two cotyledons. 

(v) At the two ends of the embryonal axis the radicle and the plumule are present. 

(vi) The stored food is present in the cotyledons and endosperm is absent. Seed is therefore non-endospermic.

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