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Sexual Reproduction in flowering Plants

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Biology

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Biology

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CBSE Gujarat Board Haryana Board

Previous Year Papers

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Class 10 Class 12

Which one of the following is surrounded by a callose wall?

  • Microspore mother cell

  • Male gamete

  • Egg

  • Pollen grain


A.

Microspore mother cell

The wall of the pollen mother cell (microspore mother cell) is deposited by callose left parenthesis straight beta minus 1 comma space 3 minus glucan right parenthesis.

The wall of the pollen mother cell (microspore mother cell) is deposited by callose left parenthesis straight beta minus 1 comma space 3 minus glucan right parenthesis.

490 Views . 5 Shares

The innermost layer of anther is tapetum whose function is :
  • dehiscence
  • mechanical
  • nutrition
  •  protection.

C.

nutrition
1827 Views . 7 Shares

The female gametophyte of a typical dicot at the time of fertilization is:
  •  8-celled
  • 7-celled
  • 6-celled
  • 4-celled

B.

7-celled
2359 Views . 6 Shares

The fertilization occurs in the :
  • ovary
  • ovule
  • embryo sac
  • nucellus.

A.

ovary
1446 Views . 7 Shares

In a bisexual flower when the gynaecium matures earlier than anther, it is called as :
  • protandry
  • protogyny
  • herkogyny
  • None of the above.

B.

protogyny
1265 Views . 11 Shares

Simultaneous meiotic division of microspore mother cells leads to :
  • tetrahedral tetrad
  • linear tetrad
  •  isobilateral
  • decussate tetrad.

A.

tetrahedral tetrad
1487 Views . 8 Shares

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