Which one of the following statements is not true?

  • [NEET 2016]
  • A

    Pollen grains of many species cause severe allergies.

  • B

    Stored pollen in liquid nitrogen can be used in the crop breeding programmes.

  • C

    Tapetum helps in the dehiscence of anther.

  • D

    Exine of pollen grains is made up of sporopollenin.

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  • [AIIMS 1981]

Describe the structure of pollen grain and explain the development of male gametophyte in it.

Arrange the following terms in the correct developmental sequence: Pollen grain, sporogenous tissue, microspore tetrad, pollen mother cell, male gametes

Where does pollen tube developes ?