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Sexual Reproduc...

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  • Question 1
    4 / -1

    When there is no distinction of sepals and petals, the non-essential floral organs are collectively called? 

  • Question 2
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    The thalamus is convex or conical; ovary develops at its tops while stamens, petals and sepals are borne successively below. This kind of floral arrangement is called?  

  • Question 3
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    Aestivation is the ________.

  • Question 4
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    Actinomorphic flowers has
    a. Radial symmetry
    b. Often irregular
    c. Two equal halves are produced only by one vertical division.  

  • Question 5
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    Assertion: In epigynous flowers, other floral organs are borne above the level of ovary.

    Reason: The ovary is inferior while other floral parts are superior.   

  • Question 6
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    Identify “A” and “B” in the T.S of mature anther:

        

  • Question 7
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    How many meiotic divisions are required to form 64 pollen grains? 

  • Question 8
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    Filiform apparatus present at micropylar part of the Synergids help in: 

  • Question 9
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    What happen to haploid megaspores formed by megaspore mother cell in an angiospermic plant? 

  • Question 10
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    Assertion: The innermost layer of microsporangium is called tapetum.
    Reason: Tapetum performs the function of protection and help in dehiscence of anther to release pollen grains.  

  • Question 11
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    A bilobed dithecous anther had 50 microspore mother cells per microsporangium. How many male gametes this anther can produce?  

  • Question 12
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    Pollen grain of large number of species can be stored in:  

  • Question 13
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    In nature, inbreeding and out breeding of plants is regulated by------?

  • Question 14
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    Continued self-pollination results in inbreeding depression as they------?

  • Question 15
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    Abundant occurrence of fossilized pollen grain is due to resistant: 

  • Question 16
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    Which kind of embryo is shown in figure below?  

  • Question 17
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    The cleavage of the zygote or earlier stage of its development into two or more units to form many embryo is called as?

  • Question 18
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    If an endosperm cell of angiosperm contain 24 chromosome, the number of chromosome in each cell of root is?  

  • Question 19
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    The meiocyte of an onion plant contains 32 chromosomes. Calculate the number of chromosomes found in its endosperm?

  • Question 20
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    Epiblast present in certain monocot embryo represents--------?

  • Question 21
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    A typical angiospemic embryo sac is though 8 nucleate is 7-celled. 8 nuclei includes______.

  • Question 22
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    The major approach towards the crop improvement programme is______.

  • Question 23
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    The correct order of stages of embryogeny in dicotyledonous embryo is:

  • Question 24
    4 / -1

    In which of the following plants fruit contain larger number of seed?

  • Question 25
    4 / -1

    Dormancy is the____.

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