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This illustration shows the features in the life history of Pandorina: A, a colony of plants. B, each plant of the colony dividing to form a new colony. C, the plants of a colony escaping as gametes. D, the conjugation of two gametes of unequal size. E, later stage in the conjugation. F, gametospore or resting spore. G, Large zoospore formed from the gametospore. H, a colony formed by the division of the zoospore, G.




Carlton C. Curtis, Nature and Development of Plants (New York: Henry Holt Company) 179


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