Question

Read the following and answer any four questions from 6(i) to 6(v).

Flowering plants reproduce sexually by the process known as pollination. In this

process the pollen from male anther is transferred to the female stigma. On the

basis of this process, answer the following questions.

(i). Which of the following is the correct sequence of event of sexual

reproduction in flower?

(a) Pollination, fertilization, seedling, embryo

(b) Seedling, embryo, fertilization, pollination

(c) Pollination, fertilization, embryo, seedling

(d) Embryo, seedling, pollination, fertilization

(ii).The process of transfer of pollen from anther of one flower to stigma of

another flower of another plant is-

(a) Self pollination

(b) Double fertilization

(c) Germination

(d) Cross pollination

(iii). Which one of the following is one of the characteristics of self-pollinated

flower?

(a) Flower remain closed and do not open

(b) Flowers are large and showy

(c) Pollen is produced in very large quantities

(d) Flowers produce nector

(iv). How does the male gamete reach the female gamete?

(a) A pollen tube grows towards the style

(b) The pollen grain moves down the style

(c) The male gamete digests its way down the style

(d) The male gamete swims down the style

(v).The anthers contain:

(a) Pistil

(b) Sepals

(c) Ovules

(d) Pollen grains in​

Answer 1

1. answer =(a)
2. answer=(d)
3. answer=(d)
4. answer=(a)
5. answer=(d)

pls mark me as brainliest answer

Answer 2

AnsweR:-

(i)Option(C) is correct.

The correct sequence of event of sexual  reproduction in flower is Pollination, fertilization, embryo, seedling.

✦Pollination is the process in which transfer of pollen to sigma happens.And then the fusion of male gamete and egg cell produces zygote.

✦The zygote divides into many by mitosis and produces embryo fertilization cause the new embryo to be formed.

✦The embryo differentiates and becomes plumule, radicle and one or two cotyledons.Integuments surrounding embryo sac forms seed coat.

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(ii)The process of transfer of pollen from anther of one flower to stigma of another flower of another plant is cross pollination.

Option(D) is correct.

✦It is the transfer of pollen from the anther of one flower to the stigma of another flower on a different individual of the same species.Whereas,Self-pollination occurs when the pollen from the anther is deposited on the stigma of the same flower, or another flower on the same plant.

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(iii)Option(A) is correct.

Flowers remain closed and do not open.

✦Self-pollinated  flowers never open to ensure that pollen grains pollinate the stigma of the same flower.The pollens are shed within the closed flowers so that self-pollination is obligatory.

✦This mechanism is called cleistogamy.

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(iv)Option(A) is correct.

✦A pollen tube grows towards the style.

✦When a pollen grain lands on the stigma of a flower of the correct species, a pollen tube begins to grow through the style and reaches an ovule inside the ovary.

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(v)The anther contains Pollen grains.

Option(D) is correct.

Pollen grains:

• They are male reproductive cells present on anther.
• The stamen is the androecium composed of anther and filament. The anther contains pollen sacs which produce pollen grains.
• Pollen grains are microscopic structures that carry the male reproductive cell of plants.
• Pollen is carried by animals, insects and the wind in order for pollination and fertilization to occur.

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