what are the three steps of evolution of seed
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Three steps of evolution of seed are :
1) origin of heterospory
2) development of integument layer for megasporangia which protect and supply food
3) retention of imatuare megaspores in the sporangia.
1) origin of heterospory
2) development of integument layer for megasporangia which protect and supply food
3) retention of imatuare megaspores in the sporangia.
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