Fig. 51(F). Sexual reproduction in pennate diatoms. a, b, Paired cells of Neidium; c, zygotes of Neidium; d, Paired cells of Sellaphora, e, Rare triplet of Cymbella in meiotic prophase; f, Mucilage envelope surrounding 2 zygotes of Cymbella cistula.
Songbirds of 2017 ~ Wood Warblers
6 years ago
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