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Las plantas gimnospermas producen semillas están totalmente expuestas o se llevan en las escamas de conos, es decir, no poseen pared ovárica que rodea a los ovocitos. Ejemplos de este tipo de plantas son:
a Coníferas, cicadáceas, ginkgoales.
b Malváceas, rosáceas, quenopodiáceas.
c Lirios, tulipanes, orquídeas.
d Maíz, trigo, arroz.
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