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The three cells found in a pollen grain when it is shed at 3-celled stage are

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Important Questions on Sexual Reproduction in Flowering Plants

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In a fully developed male gametophyte the number of nuclei is-
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Refer to the given figure of reproductive structure of Papaver and identify X and Y.
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Megasporangium along with its protective integuments is called
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A typical angiospermous ovule is attached to the placenta by means of a stalk called X. Body of the ovule fuses with X in the region called Y. Identify X and Y.
  X y
(i) Funicle Hilum
(ii) Hilum Funicle
(iii) Funicle Micropyle
(iv) Hilum Chalaza
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Identify the parts labelled A, B, C and D in the given figure and select the correct option.
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Match Column I with Column II and select the correct option from the given codes.
  Column I   Column II
(a) Funicle (i) Mass of parenchymatous cells
(b) Hilum (ii) Basal part of ovule
(c) Integument (iii) one of two protective layers of ovule
(d) Chalaza (iv) Region where body of ovule fuses with funicle
(e) Nucellus (v) Stalk of ovule
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Mature ovules are classified on the basis of funiculus. If micropyle comes to lie close to the funiculus, what is the ovule termed as?
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When micropyle, chalaza and hilum lie in a straight line, the ovule is said to be -----------------------.