Unicellular algae to multicellular land plants probably diverged from animals at the unicellular stage. Rigid cell walls and no cell migration means no folding of sheets of cells during morphogenesis. Plant development depends upon differential rates of cell division then directed cell enlargement. 本篇文章来源于网络,如有异议请联系我们,我们将在3个工作日内作出处理。 |
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