In many simple organisms, including bacteria and various protists, the life cycl

游客2025-05-09 24

问题 In many simple organisms, including bacteria and various protists, the life cycle is completed within a single generation: an organism begins with the fissionof an existing individual; the new organism grows to maturity; and it then splits into two new individuals, thus completing the cycle.

选项 A、split
B、fusion
C、explosion
D、modification

答案 A

解析 A项split“劈开，(使)裂开，分裂，分离”与画线词fission“裂开，分裂，分体”的意思相吻合，如Argument over policy led to a split in the party(有关政策的争论导致了党内的分裂)，故选A。B项fusion“熔化，熔解，熔合，熔接”；C项explosion“爆发，发出，爆炸”；D项modification“更改，修改，修正”，均与画线词的意思不一致。

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