(A) The development of fruit without fertilization is known as $Parthenocarpy$. Pollen grains are rich in growth hormones,particularly $Auxins$. When

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(A) The development of fruit without fertilization is known as $Parthenocarpy$. Pollen grains are rich in growth hormones,particularly $Auxins$. When pollen extract is applied to unpollinated carpels,the $Auxin$ present in the extract mimics the effect of natural pollination,thereby stimulating the ovary to develop into a fruit. Therefore,the correct option is $A$.

Class 12 Biology Sexual Reproduction in Flowering Plants Mix Examples-Sexual Reproduction in Flowering Plants

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Pollen extract stimulates the formation of fruit in the unpollinated carpel because the extract contains the following hormone:

A
Auxin
B
Cytokinin
C
Gibberellin
D
Auxin and cytokinin

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Sexual Reproduction in Flowering Plants

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Mix Examples-Sexual Reproduction in Flowering Plants

The zygote develops into an embryo through $.......$ and the primary endosperm cell develops into endosperm tissue through $.......$.

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Which of the following pairs of plant parts are both haploid?

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$A$: The higher organisms must evolve a special mechanism for gamete transfer.
$R$: Male and female gametes are formed in different individuals.

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Which of the following is called 'Terror of Bengal'?

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Pollen extract stimulates the formation of fruit in the unpollinated carpel because the extract contains the following hormone:

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The zygote develops into an embryo through $.......$ and the primary endosperm cell develops into endosperm tissue through $.......$.

How many spore mother cells are required to produce $64$ spores?

Which of the following pairs of plant parts are both haploid?

$A$: The higher organisms must evolve a special mechanism for gamete transfer.$R$: Male and female gametes are formed in different individuals.

Which of the following is called 'Terror of Bengal'?

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$A$: The higher organisms must evolve a special mechanism for gamete transfer.
$R$: Male and female gametes are formed in different individuals.