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Solved Examples: Sexual Reproduction in Flowering Plants | NCERT Exemplar & Revision Notes for NEET PDF Download

Q.1. Both, autogamy and geitonogamy are prevented in    [CBSE PMT’2012 S]
(a) Papaya
(b) Cucumber
(c) Castor
(d) Maize
Ans: 
a
Solution:

Papaya is dioecious i.e. male and female flowers occurs in separate plants so that it prevents both autogamy and geitonogamy (method of self pollination).

Q.2. Wind pollination is common in     [CBSE PMT’2011]
(a) Legumes
(b) Lilies
(c) Grasses
(d) Orchids
Ans: 
c
Solution:

Wind pollination is common in grasses. Grasses produce large amount of pollen which reach to opposite sex for reproduction by the help of wind.


Q.3. In which one of the following pollination is autogamous?    [CBSE PMT’2011]
(a) Geitonogamy
(b) Xenogamy
(c) Chasmogamy
(d) Cleistogamy
Ans: 
d
Solution:

Cleistogamy is autogamous pollination. When pollination and fertilization occur in unopened flower bud, it is known as cleistogamy. It ensures self-pollination and prevents cross-pollination.

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FAQs on Solved Examples: Sexual Reproduction in Flowering Plants - NCERT Exemplar & Revision Notes for NEET

1. What is sexual reproduction in flowering plants?
Ans. Sexual reproduction in flowering plants is the process by which two parent plants contribute genetic material to produce offspring. It involves the fusion of male and female reproductive cells, known as gametes, to form a zygote. This process leads to genetic variation and the production of seeds or fruits.
2. How do flowering plants reproduce sexually?
Ans. Flowering plants reproduce sexually through a series of steps. First, the male reproductive organ, called the stamen, produces pollen grains that contain the male gametes. The female reproductive organ, known as the pistil, consists of the stigma, style, and ovary. The stigma receives the pollen grains, which then travel down the style to reach the ovary. The male gametes fuse with the female gametes inside the ovary, resulting in fertilization and the formation of a zygote.
3. What are the advantages of sexual reproduction in flowering plants?
Ans. Sexual reproduction in flowering plants offers several advantages. Firstly, it leads to genetic variation, as the offspring inherit genetic material from both parents. This variation increases the chances of survival in changing environments and helps plants adapt to new conditions. Additionally, sexual reproduction allows for the exchange of genetic information, which can lead to the development of new traits and characteristics. It also enables plants to undergo natural selection, ensuring the survival of the fittest individuals.
4. What are the different methods of pollination in flowering plants?
Ans. Pollination is the transfer of pollen grains from the male reproductive organ to the female reproductive organ in flowering plants. There are two main methods of pollination: self-pollination and cross-pollination. In self-pollination, the pollen from the same flower or a different flower on the same plant is transferred to the stigma. In cross-pollination, the pollen is transferred from the stamen of one plant to the stigma of another plant of the same species. Cross-pollination can occur through various agents, including wind, water, insects, birds, and mammals.
5. What is the significance of pollinators in sexual reproduction of flowering plants?
Ans. Pollinators play a crucial role in the sexual reproduction of flowering plants. They facilitate the transfer of pollen grains from the male reproductive organ to the female reproductive organ, enabling fertilization and the production of seeds or fruits. Pollinators, such as bees, butterflies, birds, and bats, are attracted to flowers by their colors, fragrance, and nectar. As they collect nectar, pollen grains stick to their bodies and are carried to other flowers, promoting cross-pollination. This mutualistic relationship between plants and pollinators ensures the continuation of plant species and promotes biodiversity.
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