下列构造相当于蕨类的原叶体的是()

A、地钱叶状体

B、小孢子母细胞

C、胚囊

D、花粉管

E、苔藓植物原丝体

F、胚珠

相关专题: 叶状体   原丝体   花粉管  

查看答案

相关问题推荐

  • 下列结构中,属于苔类配子体世代(染色体为n)的是()。

    A、二分叉的叶状体

    B、孢子

    C、孢蒴

    D、受精卵

    E、弹丝

    F、颈卵器

    G、雌器托

    H、胞芽

    I、原丝体

    查看答案
  • 技术改造应遵循的原则有()。
    A.
    以内涵为主扩大再生产
    B.
    把提高企业经济效益和社会效益结合起来
    C.
    把技术先进性、生产适用性、经济合理性结合起来
    D.
    要依据科技进步定期进行
    查看答案
  • 9,26,51,124,173,( )

    A216B294C295D316
    查看答案
  • Effective tough survive wrap foremost refrain obtain distinguish existence available

    1 The theory supposes the ( ) of life on other planets .

    2 Would you please ( ) the toys up separately ?

    3 He built up a reputation as a ( ) businessman .

    4 There is no ( ) treatment of this disease .

    5 some rooms are ( ) to the doctors who are at the virus - control front line .

    6 The salesman finally managed to ( ) a copy of the report .

    7 It is hard to ( ) one twin from the other .

    8 Many companies managed to ( ) the pandemic .

    9 We have ( ) from going outside during the pandemic .

    10 This is first and ( ) a trade agreement.
    查看答案
  • 古典管理理论不相信管理是有规律可循的他们更相信个人经验
    查看答案
  • “战场”和“战士”这两个概念是()

    A.属种关系

    B.交叉关系

    C.全异关系
    查看答案