Definition of alternation of generations in English:

alternation of generations

noun

mass nounBiology

A pattern of reproduction occurring in the life cycles of many lower plants and some invertebrates, involving a regular alternation between two distinct forms. The generations are alternately sexual and asexual (as in ferns) or dioecious and parthenogenetic (as in some jellyfishes).
〔生〕世代交替
Example sentencesExamples
- Like plants and many protists, brown algae undergo a complex life cycle involving alternation of generations.
- Cnidarians show an alternation of generations in which two body forms, the polyp and the medusa, alternate.
- In an alternation of generations the other phase produces a brownish gall on cedars.
- In many organisms with both sexual and asexual reproduction, including most sexual protists, fungi, algae, and nonseed plants, sex involves an alternation of generations between haploid and diploid phases.
- Although they are often unicelled and simple, some algae have a 1n - 2n life cycle which constitutes an alternation of generations.

Definition of alternation of generations in US English:

alternation of generations

noun

Biology

A pattern of reproduction occurring in the life cycles of many lower plants and some invertebrates, involving a regular alternation between two distinct forms. The generations are alternately sexual and asexual (as in ferns) or dioecious and parthenogenetic (as in some jellyfish).
〔生〕世代交替
Example sentencesExamples
- In an alternation of generations the other phase produces a brownish gall on cedars.
- Although they are often unicelled and simple, some algae have a 1n - 2n life cycle which constitutes an alternation of generations.
- In many organisms with both sexual and asexual reproduction, including most sexual protists, fungi, algae, and nonseed plants, sex involves an alternation of generations between haploid and diploid phases.
- Like plants and many protists, brown algae undergo a complex life cycle involving alternation of generations.
- Cnidarians show an alternation of generations in which two body forms, the polyp and the medusa, alternate.

单词	alternation of generations
释义	Definition of alternation of generations in English: alternation of generations noun mass nounBiology A pattern of reproduction occurring in the life cycles of many lower plants and some invertebrates, involving a regular alternation between two distinct forms. The generations are alternately sexual and asexual (as in ferns) or dioecious and parthenogenetic (as in some jellyfishes). 〔生〕世代交替 Example sentencesExamples Like plants and many protists, brown algae undergo a complex life cycle involving alternation of generations. Cnidarians show an alternation of generations in which two body forms, the polyp and the medusa, alternate. In an alternation of generations the other phase produces a brownish gall on cedars. In many organisms with both sexual and asexual reproduction, including most sexual protists, fungi, algae, and nonseed plants, sex involves an alternation of generations between haploid and diploid phases. Although they are often unicelled and simple, some algae have a 1n - 2n life cycle which constitutes an alternation of generations. Definition of alternation of generations in US English: alternation of generations noun Biology A pattern of reproduction occurring in the life cycles of many lower plants and some invertebrates, involving a regular alternation between two distinct forms. The generations are alternately sexual and asexual (as in ferns) or dioecious and parthenogenetic (as in some jellyfish). 〔生〕世代交替 Example sentencesExamples In an alternation of generations the other phase produces a brownish gall on cedars. Although they are often unicelled and simple, some algae have a 1n - 2n life cycle which constitutes an alternation of generations. In many organisms with both sexual and asexual reproduction, including most sexual protists, fungi, algae, and nonseed plants, sex involves an alternation of generations between haploid and diploid phases. Like plants and many protists, brown algae undergo a complex life cycle involving alternation of generations. Cnidarians show an alternation of generations in which two body forms, the polyp and the medusa, alternate.
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