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Biology Test 99...

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  • Question 1
    4 / -1

    An octaploid male plant crossed with diploid female plant, then find the ploidy level of secondary nucleus and embryo respectively :

  • Question 2
    4 / -1

    In Citrus and Mango varieties ___(A)___ cells of maternal sporophyte of ovule start dividing and develop into the embryos.

    Find the "A" :

  • Question 3
    4 / -1

    Directions For Questions

    (A) Light and non-sticky pollen grain

    (B) Well exposed stamens

    (C) Large often – Feathery stigma

    (D) Always have single ovule in each ovary

    (E) Numerous flowers packed into Inflorescence.

    ...view full instructions

    How many above features favour anemophily?

  • Question 4
    4 / -1

    During formation of leaves and elongation of stem, some cells "left behind" from the shoot apical meristem, constituet :-

  • Question 5
    4 / -1

    Match the column–I with Column–II :-

      Column-I   Column-II
    (i)  Sieve tube (K)  Gymnospermic phloem
    (ii)  Companion cell (L)  Angiospermic phloem
    (iii)  Albuminous cells    
    (iv)  Sieve cells    
    (v)  Phloem parenchyma    
    (vi)  Pholem sclerenchymetous fibre    

  • Question 6
    4 / -1

     

    Pentamerous flower, suprior ovary with swollen axile placenta and epipetalous androecium is charecterstics of :-

  • Question 7
    4 / -1

    Match the following column I and II :-

      Column-I   Column-II
    (a)  Unisexual actinomorphic flower I  Brassicaceae
    (b)  Epipetalous and monoadalphous androecium II  Labiatae
    (c)  Didynamous androecium III  Cucurbitaceae
    (d)  Bicorpellary superiorovary IV  Malvaceae

  • Question 8
    4 / -1

    Match the plant with their suitable inflorescence :-

    a  Candytuft (I)  Cymose
    b  Cumin (II)  Corymb
    c  Maize (III)  Catkin
    d  Mulberry (IV)  Spadix
    e  Calotropis (V)  Umbel

  • Question 9
    4 / -1

    Which statements are correct ?

    (a) A sperm head contains DNA and an acrosome.

    (b) Mitocondria in the mid piece of a sperm produce ATP for sperm motility

    (c) An acrosome is specialized lysosome that contain enzyme that enable sperm to produce ATP needed to propel themselves out of the male reproductive system

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