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相关概念视频

Introduction to Seed Plants03:40

Introduction to Seed Plants

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Most plants are seed plants—characterized by seeds, pollen, and reduced gametophytes. Seed plants include gymnosperms and angiosperms.
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The Angiosperm Life Cycle02:39

The Angiosperm Life Cycle

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Plants have a life cycle split between two multicellular stages: a haploid stage—with cells containing one set of chromosomes—and a diploid stage—with cells containing two sets of chromosomes. The haploid stage is the gamete-producing gametophyte, and the diploid stage is the spore-producing sporophyte.
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Pollination and Flower Structure02:40

Pollination and Flower Structure

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Flowers are the reproductive, seed-producing structures of angiosperms. Typically, flowers consist of sepals, petals, stamens, and carpels. Sepals and petals are the vegetative flower organs. Stamens and carpels are the reproductive organs.  
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Non-vascular Seedless Plants02:26

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The diverse plant life on Earth—consisting of nearly 400,000 species—can be divided into three broad categories based on biological characteristics: nonvascular, seedless vascular, and seed plants.
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Phylogeny01:23

Phylogeny

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Phylogeny is concerned with the evolutionary diversification of organisms or groups of organisms. A group of organisms with a name is called a taxon (singular). Taxa (plural) can span different levels of the evolutionary hierarchy. For instance, the group containing all birds is a taxon (comprising the class Aves), and the group of all species of daisies (the genus Bellis) is a taxon. Phylogenies can likewise include just one genus (i.e., depict species relationships) or span an entire kingdom.
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Seedless Vascular Plants03:24

Seedless Vascular Plants

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Seedless Vascular Plants Were the First Tall Plants on Earth
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苗中的伪:一篇综述

Jakub Baczyński1,2, Regine Claßen-Bockhoff3

  • 1Institute of Evolutionary Biology, Faculty of Biology, Biological and Chemical Research Centre, University of Warsaw, Warsaw, Poland.

Annals of botany
|July 21, 2023
PubMed
概括

伪丹提亚,或假花,是多种多花的单元. 本综述严格地将伪定义为具有华丽的外围和生殖中心的花样结构,在血管苗中独立进化.

科学领域:

  • 植物学 植物学
  • 进化生物学 进化生物学
关键词:
聚合是一种聚合.发展发展发展发展发展.劳动分工的分工方式进化 演化 演化 演化 演化 演化 演化 演化花的单位 花的单位.开花的植物 开花的植物遗传调节是一种基因调节.在花期内,花朵发芽.系统条件 系统条件授粉生物学 授粉生物学射线花 射线花的花耀眼的Bractct可以看到.

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  • 发展生物学 发展生物学

    • 背景情况:

    • 伪兰花,或"假花",是复杂的多花型结构,模仿单花的形式和功能.
    • 从历史上看",伪丹"一词涵盖了各种各样的花朵,从具有鲜明的花束到高度缩小的单元.
    • 它们的广泛分布和形态多样性使得 pseudanthia 对于血管精子的进化和发育研究至关重要.

    结论:

    • Pseudanthia sensu stricto在大 angiosperm 血统中反复演变突出了发育约束和选择性压力.
    • 这些压力包括授粉者相互作用和环境条件.
    • 未来的研究应该探索这些迷人的结构的进化和生态作用.