Sexual Reproduction in Flowering Plants Question 55

55. Eight nucleate embryo sacs are

[2000]

(a) always tetrasporic

(b) always monosporic

(c) always bisporic

(d) sometime monosporic, sometimes bisporic and sometimes tetrasporic

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Answer : d

Hints & Solutions

(d) Monosporic type - eight nucleated Polygonum type. In this types only one megapore situated at chalazal end takes part in the development of embryosac. Bisporic type - eight nucleated Allium type. Tetrasporic type - eight nucleated Adoxa type.