英文字典中文字典


英文字典中文字典51ZiDian.com



中文字典辞典   英文字典 a   b   c   d   e   f   g   h   i   j   k   l   m   n   o   p   q   r   s   t   u   v   w   x   y   z       







请输入英文单字,中文词皆可:



安装中文字典英文字典查询工具!


中文字典英文字典工具:
选择颜色:
输入中英文单字

































































英文字典中文字典相关资料:


  • Gymnosperm - Wikipedia
    The gymnosperms ( ˈdʒɪmnəˌspɜːrmz, - noʊ - ⓘ nə-spurmz, -⁠noh-; lit 'revealed seeds') are a group of woody, perennial seed-producing plants, typically lacking the protective outer covering which surrounds the seeds in flowering plants, that include conifers, cycads, Ginkgo, and gnetophytes, forming the clade Gymnospermae [2]
  • Gymnosperm | Definition, Description, Plants, Examples, Phylogeny . . .
    gymnosperm, any vascular plant that reproduces by means of an exposed seed, or ovule—unlike angiosperms, or flowering plants, whose seeds are enclosed by mature ovaries, or fruits The seeds of many gymnosperms (literally, “naked seeds”) are borne in cones and are not visible until maturity
  • Gymnosperms – Definition, Examples, Life Cycle - Science Notes and . . .
    A gymnosperm is a type of seed-producing plant whose seeds are not enclosed within an ovary or fruit The term “gymnosperm” derives from the Greek words gymnos (γυμνός), meaning “naked,” and sperma (σπέρμα), meaning “seed ”
  • Gymnosperm - Definition, Examples and Life Cycle - Biology Dictionary
    Gymnosperms are a group of plants which produce seeds that are not contained within an ovary or fruit The seeds are open to the air and are directly fertilized by pollination
  • Gymnosperms: Definition, Examples, and Reproduction - ThoughtCo
    Gymnosperms are flowerless plants that produce cones and seeds The term gymnosperm literally means "naked seed," as gymnosperm seeds are not encased within an ovary Rather, they sit exposed on the surface of leaf-like structures called bracts
  • Gymnosperms- Characteristics, Morphology, Classification, Uses
    Definition: Gymnosperms are the plants that are most ancient vascular, flowerless, seed-producing, and can reproduce through an exposed seed or ovule They produce seeds without fruits which means the ovules and the seeds that develop from these ovules are not enclosed in the fruit wall
  • 26. 2: Gymnosperms - Biology LibreTexts
    Gymnosperms, meaning “naked seeds,” are a diverse group of seed plants and are paraphyletic Paraphyletic groups are those in which not all members are descendants of a single common ancestor
  • Gymnosperms Definition - BYJUS
    Gymnosperms are the seed-producing plants, but unlike angiosperms, they produce seeds without fruits These plants develop on the surface of scales or leaves, or at the end of stalks forming a cone-like structure Gymnosperms belong to kingdom ‘Plantae ‘ and sub-kingdom ‘Embryophyta’
  • Gymnosperms – Biology - UH Pressbooks
    Gymnosperms, meaning “naked seeds,” are a diverse group of seed plants and are paraphyletic Paraphyletic groups are those in which not all members are descendants of a single common ancestor
  • Beyond pine Cones: An Introduction to Gymnosperms - Arnold Arboretum
    Gymnosperms are an intriguing group of plants, yet in many ways they are not well known Most people can recognize a pine, with its familiar woody cones, but they may not know that this and other conifers are gymnosperms Or, they may think that conifers are the only plants in the gymnosperm group





中文字典-英文字典  2005-2009