NCERT Solutions for Class 7 Science Chapter 8 - Reproduction In Plants

1. Fill in the Blanks:
(a) Production of a new individual from the vegetative parts of the parent is called __________.
Ans: Vegetative propagation

(b) A flower may have either male or female reproductive parts. Such a flower is called ________.
Ans: Unisexual flowers

(c) The transfer of pollen grains from the anther to the stigma of the same or of another flower of the same kind is known as________.
Ans: Pollination

(d) The fusion of male and female gametes is termed as_________.
Ans: Fertilisation

(e) Seed dispersal takes place by means of _____, _____and______.
Ans: Wind, insect, water

4. State the main difference between asexual and sexual reproduction.
Ans: The difference between asexual and sexual reproduction is shown below.

5. Sketch the reproductive parts of a flower.
Ans: The pistil is the female part of the flower which includes stigma, style and ovary. Inside the ovary, ovules are present. Stamen is the male part of the flower which contains anther and filament. The anther contains pollen.

6. Explain the difference between self-pollination and cross-pollination.
Ans: The difference between self-pollination and cross-pollination is shown below.

7. How does the process of fertilization take place in flowers?
Ans:

• During pollination when the pollen grains reach the stigma of the flower, a pollen tube is generated where the pollen runs down through the style to the ovary.

• The pollen grains then fertilize the ovary which leads to the formation of a zygote. 

• The formation of zygotes by the involvement of male and female gametes is known as fertilisation.

8. Describe the various ways by which seeds are dispersed.
Ans: The various ways by which seeds are dispersed are:
(a) Wind
(b) Water
(c) Insects
(d) Animals
(e) Birds
The seeds which are lighter in weight and smaller in size are taken by the wind. The seeds which can float are taken by water. Seeds with spines are taken by animals and birds.

9. Match items in Column I with those in Column II:

Ans:

10. Tick ( ) the correct answer:
(a) The reproductive part of a plant is the

(i) Leaf
(ii) Stem
(iii) Root
(iv) Flower

Ans: (iv) Flower

(b)The process of fusion of the male and female gametes is called

(i) Fertilisation

(ii) Pollination

(iii) Reproduction

(iv) Seed formation

Ans: (i) Fertilisation

(c) Mature ovary forms the

(i) Seed

(ii) Stamen

(iii) Pistil

(iv) Fruit

Ans: (iv) Fruit

(d) A spore-producing plant is

(i) Rose

(ii) Bread mould

(iii) Potato
(iv) Ginger

Ans: (ii) Bread mould

(e)Bryophyllum can reproduce by its

(i) Stem

(ii) Leaves

(iii) Root

(iv) Flowers

Ans: (ii) Leaves

Reproduction in Plants Class 7 Quick Overview of Detailed Structure of Topics 

Reproduction in Plants Class 7 PDF - Important Points

• Modes of Reproduction: Plants reproduce through both sexual and asexual modes. Sexual reproduction involves the fusion of male and female gametes, while asexual reproduction occurs without the involvement of gametes.

• Asexual Reproduction: Asexual reproduction in plants involves the production of new individuals from vegetative parts like roots, stems, and leaves. Common methods of asexual reproduction include budding, fragmentation, and spore formation.

• Budding: A form of asexual reproduction in which a new organism develops as an outgrowth, or bud, on the parent organism. Budding is commonly observed in organisms such as yeast, hydra, and some plants like Bryophyllum.

• Fragmentation: Fragmentation is a method of asexual reproduction in which an organism breaks into fragments, each of which can grow into a new individual. This process is common in organisms like algae, fungi, and some plants. 

• Spore Formation: Spore formation is a type of asexual reproduction in which specialised reproductive cells called spores are produced by an organism. Spore formation is common in fungi, algae, mosses, ferns, and some bacteria. 

• Sexual Reproduction in Flowering Plants: Flowers are the reproductive organs of flowering plants. They contain both male (stamen) and female (pistil) reproductive parts. The male part produces pollen grains containing male gametes (sperm), while the female part contains ovules with female gametes (eggs).

• Pollination: Pollination is the transfer of pollen grains from the anther to the stigma of a flower. It can occur through various agents like wind, water, animals (insects, birds, bats), or even self-pollination within the same flower.

• Fertilisation: Fertilization is the fusion of a pollen grain with an ovule, forming a zygote. After fertilisation, the ovule develops into a seed containing the embryo plant.

• Seed Formation and Dispersal: The ovule develops into a seed after fertilisation. Seeds are dispersed through various means, such as wind, water, animals, and gravity to ensure the spread of plants to new locations.

• Advantages of Reproduction in Plants: Reproduction ensures the continuation of plant species and promotes genetic diversity. Asexual reproduction allows the rapid multiplication of plants with desirable traits, while sexual reproduction promotes genetic variation through the mixing of genetic material.

Benefits of Vedantu’s Class 7 Science Chapter 8 Reproduction in Plants Question Answer

• Reproduction In Plants Class 7 Questions and Answers delve into the mechanisms of plant reproduction, covering topics such as sexual and asexual reproduction.

• Class 7 Science Chapter 8 Reproduction In Plants Question Answer provides a comprehensive understanding of how plants propagate and ensure the continuation of their species.

• Class 7 Science Chapter 8 Question Answer PDF offers detailed explanations of the modes of reproduction in plants and the role of flowers in sexual reproduction, making it easier for students to grasp the concepts effectively. 

• With clear explanations and illustrative diagrams, students can better visualise the different reproductive structures and understand their functions.

• Class 7 Science Chapter 8 Question Answer discusses various aspects of plant reproduction, helping students comprehend the significance of pollination, fertilisation, and seed dispersal in the life cycle of plants. 

• Reproduction In Plants Class 7 Solutions is prepared to help students prepare for exams by offering practice questions and answers that enhance their problem-solving skills and boost their confidence. 

Important Study Materials for Reproduction in Plants Class 7

Conclusion

Vedantu’s NCERT Solutions for Science Chapter 8, Reproduction in Plants  Class 7, offers a vital tool for students to understand plant reproduction easily. It emphasises crucial aspects like the different methods of reproduction in plants, including sexual and asexual reproduction. Focus on understanding plant structures involved in reproduction, such as flowers and seeds. Previous year question papers typically include around 4-6 questions from this chapter, underlining its importance in exams. By utilising these solutions, students can grasp the concepts effectively, enhance their knowledge, and confidently tackle questions related to plant reproduction in their exams.

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