Class XII · Biology practice
Sexual Reproduction in Flowering Plants MCQs
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501 questions in this collection · Page 7 of 51
Question 61 of 501
📘 CLASS XII
Sexual Reproduction In Flowering Plants
Flowers pollinated by flies and beetles secrete:
The flowers pollinated by flies and beetles secrete foul odours to attract these animals.
Question 62 of 501
📘 CLASS XII
Sexual Reproduction In Flowering Plants
The condition where male and female flowers are present on the same plant is called:
If both male and female flowers are present on the same plant such as castor and maize, it is monoecious.
Question 63 of 501
📘 CLASS XII
Sexual Reproduction In Flowering Plants
Monoecious plants (like Castor/Maize) prevent:
If both male and female flowers are present on the same plant (monoecious), it prevents autogamy but not geitonogamy.
Question 64 of 501
📘 CLASS XII
Sexual Reproduction In Flowering Plants
Pollen-pistil interaction involves recognition of pollen mediated by:
This dialogue is mediated by chemical components of the pollen interacting with those of the pistil.
Question 65 of 501
📘 CLASS XII
Sexual Reproduction In Flowering Plants
During artificial hybridization in bisexual flowers, emasculation is done:
Removal of anthers from the flower bud before the anther dehisces... is necessary.
Question 66 of 501
📘 CLASS XII
Sexual Reproduction In Flowering Plants
In triple fusion, the second male gamete fuses with:
The other male gamete moves towards the two polar nuclei located in the central cell and fuses with them.
Question 67 of 501
📘 CLASS XII
Sexual Reproduction In Flowering Plants
The Primary Endosperm Cell (PEC) develops into:
The central cell after triple fusion becomes the primary endosperm cell (PEC) and develops into the endosperm.
Question 68 of 501
📘 CLASS XII
Sexual Reproduction In Flowering Plants
Endosperm development precedes embryo development to:
Most zygotes divide only after certain amount of endosperm is formed. This is an adaptation to provide assured nutrition to the developing embryo.
Question 69 of 501
📘 CLASS XII
Sexual Reproduction In Flowering Plants
Which part of the embryonal axis is located above the level of cotyledons?
The portion of embryonal axis above the level of cotyledons is the epicotyl.
Question 70 of 501
📘 CLASS XII
Sexual Reproduction In Flowering Plants
The cylindrical portion below the level of cotyledons that terminates in the radicle is:
The cylindrical portion below the level of cotyledons is hypocotyl that terminates at its lower end in the radicle.
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