Which one of the following statements is not true?

  • A
    The flowers pollinated by flies and bats secrete foul odour to attract them.
  • B
    Honey is made by bees by digesting pollen collected from flowers.
  • C
    Pollen grains are rich in nutrients and they are used in the form of tablets and syrups.
  • D
    Pollen grains of some plants cause severe allergies and bronchial afflictions in some people.

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Give the ploidy of the following structures in angiospermic plants: Zygote,Endosperm,and Ovum.

How many meiotic divisions are required to produce $100$ seeds/grains of wheat?

Which of the following pairs of structures in plants possess a haploid number of chromosomes?

$A$ : Continued self-pollination checks inbreeding depression.
$R$ : Pollen release and stigma receptivity are synchronised.

Indicate the stages where meiosis and mitosis occur $(1, 2$ or $3)$ in the flow chart: Megaspore mother cell $\xrightarrow{1}$ Megaspores $\xrightarrow{2}$ Embryo sac $\xrightarrow{3}$ Egg.

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