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词汇 polyembryony
释义

Definition of polyembryony in English:

polyembryony

noun ˌpɒlɪˈɛmbrɪəniˌpälēˈembrēənē
mass nounBiology
  • The formation of more than one embryo from a single fertilized ovum or in a single seed.

    〔生〕多胚(性),多胚现象

    Example sentencesExamples
    • On arriving in Texas, he spent most of his research efforts studying polyembryony, first in the armadillo, and then in various parasitic wasps.
    • Within the sporocyst, a special form of asexual reproduction, known as polyembryony, then occurs.
    • A characteristic feature of gymnosperms is polyembryony manifested in the formation of more than one embryo in immature seed.
    • Three-banded armadillos developed a unique antipredator strategy by entirely rolling up into a ball, and nine-banded armadillos are the only vertebrates to reproduce by obligate monozygotic polyembryony.
    • The miracidia will then penetrate prosobranch snails, Elimia symmetrica, where they will transform first into mother sporocysts, which will give rise to daughter sporocysts via polyembryony.

Derivatives

  • polyembryonic

  • adjective
    Biology
    • Over half of the seeds produced in both the field and greenhouse experiments were polyembryonic, producing two to four seedlings.
      Example sentencesExamples
      • At the end of the experiment, seedlings were gently removed from the soil to be sure that polyembryonic individuals were indeed separate and not simply multiple stems of a single individual.
      • Interestingly, multiple lineages of Hymenopterans have switched from syncytial to holoblastic embryonic cleavage, or to polyembryonic development.
      • Patterson's early work on polyembryonic hymenoptera was almost forgotten for 75 years.
      • Polyembryony was further characterized by determining DNA content and fingerprints of embryos obtained from 157 polyembryonic kernels.

Definition of polyembryony in US English:

polyembryony

nounˌpälēˈembrēənē
Biology
  • The formation of more than one embryo from a single fertilized ovum or in a single seed.

    〔生〕多胚(性),多胚现象

    Example sentencesExamples
    • Three-banded armadillos developed a unique antipredator strategy by entirely rolling up into a ball, and nine-banded armadillos are the only vertebrates to reproduce by obligate monozygotic polyembryony.
    • Within the sporocyst, a special form of asexual reproduction, known as polyembryony, then occurs.
    • A characteristic feature of gymnosperms is polyembryony manifested in the formation of more than one embryo in immature seed.
    • On arriving in Texas, he spent most of his research efforts studying polyembryony, first in the armadillo, and then in various parasitic wasps.
    • The miracidia will then penetrate prosobranch snails, Elimia symmetrica, where they will transform first into mother sporocysts, which will give rise to daughter sporocysts via polyembryony.
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