Prehistoric plants. Calamites sp. Base of lycopsid tree stump buried while still upright, as seen from underneath. A metal plate keeps Pith cast of Calamites , an extinct sphenopsid, but a close relative of the modern horsetails Spore , a reproductive cell capable of developing into a new individual without fusion with another reproductive cell.
Spores thus differ from gametes, which are reproductive cells that must fuse in pairs in order to give rise to a new individual. Spores are agents of asexual reproduction, whereas gametes are agents…. History at your fingertips.
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