Q38
4 marksSection E

Pollination is an important process in sexual reproduction of plants. It is an essential process that facilitates fertilisation in plants. Pollinating agents can be wind, water, insects and birds. Several changes take place in the flower after the fertilization has taken place. (a) Write the main difference between self-pollination and cross-pollination. (b) Name the part of the flower which attracts insects for pollination. What happens to this part after fertilisation? (c) (i) Define fertilisation. What is the fate of ovules and the ovary in a flower after fertilisation? OR (c) (ii) In a germinating seed, which parts are known as future shoot and future root? Mention the function of cotyledon.

How do Organisms Reproduce?
Sexual Reproduction
Official Answer

(a) The main difference between self-pollination and cross-pollination is that in self-pollination, the pollen is transferred from the stamen to the stigma of the same flower, whereas in cross-pollination, the pollen is transferred from the stamen of one flower to the stigma of another flower. (b) The part of the flower that attracts insects for pollination is the petals. After fertilisation, the petals usually fall off. (c) (i) Fertilisation is the fusion of the male and female gametes to form a zygote. After fertilisation, the ovules develop into seeds and the ovary develops into a fruit. OR (c) (ii) In a germinating seed, the radicle is known as the future root and the plumule is known as the future shoot. The cotyledon functions as a food storing organ.

self-pollinationcross-pollinationpetalsfertilisationovulesovarycotyledonradicleplumule

Marking Scheme

  • 1(a) 1 mark for explaining the difference between self-pollination and cross-pollination
  • 2(b) 1 mark for naming the part of the flower that attracts insects for pollination and explaining what happens to it after fertilisation
  • 3(c) (i) 1 mark for defining fertilisation and explaining the fate of ovules and ovary after fertilisation OR (c) (ii) 1 mark for explaining the function of cotyledon and naming the future shoot and future root

Hint

Pollination is the transfer of pollen from the stamen to the stigma of a flower. Fertilisation is the fusion of the male and female gametes to form a zygote.

Quick Oral Answer

Pollination is the transfer of pollen from the stamen to the stigma of a flower. Fertilisation is the fusion of the male and female gametes to form a zygote. The petals of a flower attract insects for pollination and usually fall off after fertilisation. The ovules develop into seeds and the ovary develops into a fruit after fertilisation.

Analysis & Explanation

This question requires the student to understand the process of pollination and fertilisation in plants. The student should be able to explain the difference between self-pollination and cross-pollination, and describe the changes that take place in the flower after fertilisation. The student should also be able to define fertilisation and explain the fate of ovules and ovary after fertilisation.

Common Mistakes

  1. 1Confusing self-pollination with cross-pollination
  2. 2Not explaining the changes that take place in the flower after fertilisation
  3. 3Not defining fertilisation correctly

Interesting Facts

Pollination is an essential process for the reproduction of plants

Fertilisation is the fusion of the male and female gametes to form a zygote

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Frequently Asked Questions

How many marks does this question carry in CBSE Class 10 Science 2024?

This question carries 4 marks in the CBSE Class 10 Science 2024 examination.

Which chapter does this question come from in Science?

This question is from the chapter "How do Organisms Reproduce?" in the CBSE Class 10 Science syllabus.

What topic does this question cover in Science?

This question covers the topic "Sexual Reproduction" from CBSE Class 10 Science.

What type of question is this in the CBSE Class 10 Science 2024 paper?

This question appears in Section E in the CBSE Class 10 Science 2024 paper.