Class XII · Biology practice
Sexual Reproduction in Flowering Plants MCQs
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501 questions in this collection · Page 27 of 51
Question 261 of 501
📘 CLASS XII
Sexual Reproduction In Flowering Plants
Which cell in the pollen grain is responsible for giving rise to the two male gametes?
In the remaining species, the generative cell divides mitotically to give rise to the two male gametes.
Question 262 of 501
📘 CLASS XII
Sexual Reproduction In Flowering Plants
Which of the following plants has an ovary containing a single ovule?
The number of ovules in an ovary may be one (wheat, paddy, mango) to many (papaya, water melon, orchids).
Question 263 of 501
📘 CLASS XII
Sexual Reproduction In Flowering Plants
Identify the incorrectly matched pair regarding ovule structure.
Opposite the micropylar end is the chalaza, representing the basal part of the ovule. The micropyle is the small opening at the tip.
Question 264 of 501
📘 CLASS XII
Sexual Reproduction In Flowering Plants
The Megaspore Mother Cell (MMC) differentiates in the:
Ovules generally differentiate a single megaspore mother cell (MMC) in the micropylar region of the nucellus.
Question 265 of 501
📘 CLASS XII
Sexual Reproduction In Flowering Plants
What is the ploidy of the functional megaspore and the female gametophyte respectively?
The functional megaspore is haploid (n) formed by meiosis. It develops into the female gametophyte (embryo sac), which is also haploid (n).
Question 266 of 501
📘 CLASS XII
Sexual Reproduction In Flowering Plants
The egg apparatus consists of:
The egg apparatus, in turn, consists of two synergids and one egg cell.
Question 267 of 501
📘 CLASS XII
Sexual Reproduction In Flowering Plants
In which type of pollination is the pollen genetically different from the stigma it lands on?
Xenogamy is the only type of pollination which during pollination brings genetically different types of pollen grains to the stigma.
Question 268 of 501
📘 CLASS XII
Sexual Reproduction In Flowering Plants
Which characteristic is NOT associated with insect-pollinated flowers?
Insect-pollinated flowers are large, colorful, fragrant and rich in nectar. Dry and light pollen is characteristic of wind pollination.
Question 269 of 501
📘 CLASS XII
Sexual Reproduction In Flowering Plants
Which of the following is an example of a marine seagrass pollinated by water?
Some examples of water pollinated plants are Vallisneria and Hydrilla which grow in fresh water and several marine sea-grasses such as Zostera.
Question 270 of 501
📘 CLASS XII
Sexual Reproduction In Flowering Plants
Pollen robbers are defined as:
Many insects may consume pollen or the nectar without bringing about pollination. Such floral visitors are referred to as pollen/nectar robbers.
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