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Consider the following statements with r...

Consider the following statements with respect to flowering plants I. The pollen grains represent the male gametes.II. The functional megaspore develops into the embryo sac represent the female gamete.III. Transfer of pollen grains from anther to the stigma of different plant is known as xenogamy.IV. Transfer of pollen grains from anther to the stigma of another flower of the same plant is known as geitonogamy. Of the above statements.

A

I and ll alone are correct

B

I and ll alone are correct

C

I and IV alone are correct

D

III and IV alone are correct

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Transfer of pollen grains from the anther to the stigma of another flower of the same plant is called

When pollen grains of a flower, pollinate the stigma of another flower of the same plant, it is called

the transfer of pollen grains from anther to stigma of a flower is called as ______.

Transfer of pollen from selected male plant to stigma of a female plant __________.

Assertion : Although geitonogamy is functionally crosspollination involving a pollinating agent, genetically it is similar to autogamy. Reason : In geitonogamy, pollen grains from the anthers of one flower are transferred to the sigma of another flower borne on the same plant.

Consider the following statements with respect to angiosperms. I. The male sex organ in a flower is the stamen.II. The anthers following mitosis produce pollen grains.III. In an embryo sac, the Primary Endosperm Nucleus (PEN) is diploid. IV. After double fertilisation the ovules develop into seeds and ovaries develop into fruit. Of the above statements.

Read the following statements and select the correct option. Statement 1 : In pea plant, transfer of pollen grains to the stigma is easy. Statement 2 : In cross pollinating plants, pollination does not take place.

Study the following statements and select the correct option. (i) Tapetum nourishes the developing pollen grains. (ii) Hilum represents the junction between ovule and funicle. (iii) In aquatic plants such as water hyacinth and waterlily, pollination occurs by water. (iv) The primary endosperm nucleus is triploid.

Consider the following statements. (i) Polyspermy may bring about fertilisation of egg by more than one male nucleus or the supernumerary sperms may fertilise other components of embryo sac much as synergids or antipodals. (ii) In angiosperms, pollen tube is normally an unbranched structure which ususally persists after fertilisation. (iii) Intine is the inner, pectocellulosic layer of pollen grain wall which is destroyed during acetolysis. (iv) Exine layer of pollen grain comprises of an outer non-sculptured layer sexine and an inner sculptured layer tectum. Which of the following combinations of above given statements is correct ?

{: ( "Pollen", "Nector"),( "Pollen is a fine to coarse powdery substance comprising pollen grains which are male micrgrogametophytes of seed plants, which produce male gametes", "It is a sweet viscous secretion secreted by the flower of plants.") :}

SARAS PUBLICATION-MODEL QUESTION PAPER 6-EXERCISE
  1. Which of the following statements regarding photoperiodism is false?

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  2. The residual persistent nucellus in the seed of black pepper and beet ...

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  3. Consider the following statements with respect to flowering plants I. ...

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  4. Which of the following is false in angiosperms?

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  5. Each secondary spermatocyte after second meiotic division produces:

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  6. What are hormone releasing IUDs?

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  7. Read the statements regarding a stable community and choose the correc...

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  8. The cytokine barrier among these is:

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  9. Ringworms are caused by:I. Wuchereria,II. Microsporum,III. Haemophilus...

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  10. Read the statements.I. IgE antibodies are produced in an allergic reac...

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  11. The microbial biocontrol agent for butterfly caterpillar is:

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  12. The first human-like hominid was called:

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  13. Oparin and Haldane proposed:

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  14. Flame cells of flatwoims help in:I. osmoregulation,II. Digestion,III. ...

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  15. Read thestatements regarding echinoderms and choose the correct option...

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  16. This class of animals are all ectoparasites in some fishes:

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  17. The structure in earthworm which serves as a wedge to force open crack...

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  18. Which among these is not involved in excretion in cockroaches?

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  19. Frogs:

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  20. Most of the cartilages in vertebrate embryo are replaced in adult by:

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