Biology
General
Easy

Question

Cleavage polyembryony occurs in

  1. P i n u s  
  2. Mini C y c a s  
  3. C y c a s  
  4. E p h e d r a  

The correct answer is: P i n u s


    Polyembryony is of common occurrence among the gymnosperms. This is possible because more than one archegonia are fertilized and more than one zygote are formed. These develop into embryos but only one of them succeeds in developing into a complete embryo. In the conifers, there is a cleavage polyembryony. In this case, all the four cells of the young embryo separate and develop into four embryos, but only one completely develops and others abort, e. g. comma blank P i n u s.

    Related Questions to study

    General
    Biology

    Isogamy is found in

    Isogamy is found in

    BiologyGeneral
    General
    Biology

    Algal zone is present in

    Algal zone is present in

    BiologyGeneral
    General
    Biology

    Which group of plant constitute the lower bryophytes?

    Which group of plant constitute the lower bryophytes?

    BiologyGeneral
    parallel
    General
    Biology

    Two adjacent filaments of S p i r o g y r a blank a f f i n i s blankeach 10 cells participating in reproduction. How many new S p i r o g y r a plants are produced during sexual reproduction?

    Two adjacent filaments of S p i r o g y r a blank a f f i n i s blankeach 10 cells participating in reproduction. How many new S p i r o g y r a plants are produced during sexual reproduction?

    BiologyGeneral
    General
    Biology

    The members of Phaeophyceae are commonly called

    The members of Phaeophyceae are commonly called

    BiologyGeneral
    General
    Biology

    In F u n a r i a comma the number of peristomial teeth is

    In F u n a r i a comma the number of peristomial teeth is

    BiologyGeneral
    parallel
    General
    Biology

    The red colour of ‘red sea’ is due to which of the following blue-green algae?

    The red colour of ‘red sea’ is due to which of the following blue-green algae?

    BiologyGeneral
    General
    Biology

    Storage bodies, pyrenoids in the chloroplast contain

    Storage bodies, pyrenoids in the chloroplast contain

    BiologyGeneral
    General
    Biology

    In comparition to angiosperm, which one of the following algae exhibits haplo-diplontic life cycle

    In comparition to angiosperm, which one of the following algae exhibits haplo-diplontic life cycle

    BiologyGeneral
    parallel
    General
    Biology

    P i n u s belong to the class

    P i n u s belong to the class

    BiologyGeneral
    General
    Biology

    In gymnosperms, the nucellus is protected by envelops and this composite structure is known as

    In gymnosperms, the nucellus is protected by envelops and this composite structure is known as

    BiologyGeneral
    General
    Biology

    The bryophytes are fundamentally terrestrial plants but require presence of water to complete their life cycle. The water is needed for
    I) dehiscence of antheridia
    II) liberation of antherozoids
    III) transfer of sperms from antheridia to archegonia
    IV) opening of archegonial neck
    V) the movement of antherozoids into the archegonial neck
    Which of the statements given above are correct?

    The bryophytes are fundamentally terrestrial plants but require presence of water to complete their life cycle. The water is needed for
    I) dehiscence of antheridia
    II) liberation of antherozoids
    III) transfer of sperms from antheridia to archegonia
    IV) opening of archegonial neck
    V) the movement of antherozoids into the archegonial neck
    Which of the statements given above are correct?

    BiologyGeneral
    parallel
    General
    Biology

    In which of the following group would you place a plant, which produce seeds but lacks fruits?

    In which of the following group would you place a plant, which produce seeds but lacks fruits?

    BiologyGeneral
    General
    Biology

    In …A… gametophytic phase is dominant, while in …B… sporophytic phase in dominant.
    Identify the A and B. choose the correct option

    In …A… gametophytic phase is dominant, while in …B… sporophytic phase in dominant.
    Identify the A and B. choose the correct option

    BiologyGeneral
    General
    Biology

    Which of the following part of F u n a r i a sporophyte is involved in the dispersal of spores?

    Which of the following part of F u n a r i a sporophyte is involved in the dispersal of spores?

    BiologyGeneral
    parallel

    card img

    With Turito Academy.

    card img

    With Turito Foundation.

    card img

    Get an Expert Advice From Turito.

    Turito Academy

    card img

    With Turito Academy.

    Test Prep

    card img

    With Turito Foundation.