Rhizoid A unicellular rootlike structure found in certain algae and in the gametophyte generation of the bryophytes and some ferns.
在类、苔藓植物和裸子植物子体中存在的由单个细的类似根的结构。
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In the 1940s, author Jack Williamson coined the term, " terraforming." To terraform is to create an ecosystem that supports living organisms—from large, complicated vertebrates, to simple, unicellular bacteria.
在 1940 年代,作家杰克·威廉姆森 (Jack Williamson) 创造了“地形改造”一词。地形改造就是创造一支持体的态系统——从大型、复杂的脊椎动到简单的单细胞细菌。
A further argument against the simple wear and tear theory is the observation that the time within which organisms age lies between a few days (even a few hours for unicellular organisms) and several thousand years, as with mammoth trees.
反对简单磨损理论的另一论点是观察到体老化的时间介于几天(对于单细胞甚至是几小时)到几千年之间,就像猛犸象树一样。