NCERT Solutions for Class 7 Science Chapter 12 Reproduction in Plants

NCERT Solutions For Class 7 Science Chapter 12 PDF Free Download

NCERT Solutions for Class 7 Science Chapter 12 – Reproduction in Plants is one of the important and interesting topics you come across in CBSE Class 7. The NCERT solutions that we are presenting for grade 7 have been framed to help students in learning and practising questions and different concepts related to reproduction in plants.

The NCERT solutions for chapter 12 of class 7 science given here contains solved exercises along with suitable examples that will help students to prepare well for exams. The solutions include both objective (MCQs) and long and short type of questions related to this chapter, and it further gives an idea about the exam pattern and marking scheme of the paper.

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Access Answers of NCERT Solutions for Class 7 Science Chapter 12 Reproduction in Plants

Exercise Questions

1. Fill in the blanks:

(a) Production of new individuals from the vegetative part of parent is called_____________.

(b) A flower may have either male or female reproductive parts. Such a flower is called_____________.

(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 _____________.

(d) The fusion of male and female gametes is termed as _____________.

(e) Seed dispersal takes place by means of _____________, _____________ and _____________.

Solution:

(a) Production of new individuals from the vegetative part of parent is called vegetative propogation.

(b) A flower may have either male or female reproductive parts. Such a flower is called unisexual.

(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 Pollination.

(d) The fusion of male and female gametes is termed as fertilisation.

(e) Seed dispersal takes place by means of wind, water and animals.

2. Describe the different methods of asexual reproduction. Give examples.

Solution:

Asexual modes of reproduction are as follows

Vegetative propagation:

A plant can produce new plants from vegetative parts of the plant like roots, stems.

Budding:

It involves the formation of a new individual from a bulb-like projection called a bud.

Fragmentation:

New organisms are formed from the fragments of the parent body.

Spore formation:

Plants reproduce by the formation of spores.

3. Explain what you understand by sexual reproduction.

Solution:

Sexual reproduction is a method where male and female gametes fuse to form a new individual. In plants, stamens and pistils are male and female reproductive organs which bear the anthers and ovary respectively.

4. State the main difference between asexual and sexual reproduction.

Solution:

Asexual reproduction Sexual reproduction
It requires only one parents Requires a male and female parent
Daughter cells formed are identical to parents and to each other. Newly formed offsprings show variations in comparision to the parents.
Special reproductive organs are not required Special reproductive organs are required
Ex: Yeast, rose, jasmine Ex: Insects, animals

5. Sketch the reproductive parts of a flower.

Solution:

reproductive parts of a flower

6. Explain the difference between self-pollination and cross-pollination.

Solution:

Self-pollination Cross-pollination
It involves the transfer of pollen from the stamen to the pistil of the same flower. It involves the transfer of pollen from the stamen of one flower to the pistil of another flower.
Self-pollination occurs only in bi-sexual flowers It occurs in both unisexual and bisexual flowers

7. How does the process of fertilisation take place in flowers?

Solution:

The process of fusion of male and female gametes (to form a zygote) is called fertilisation. The zygote develops into an embryo and embryo undergoes mitotic cell division to form seeds.

8. Describe the various ways by which seeds are dispersed.

Solution:

Seeds and fruits of plants are carried away by wind, water and animals. Winged seeds such as those of drumstick and maple, light seeds of grasses or hairy seeds of aak (Madar) and hairy fruit of sunflower, get blown off with the wind to faraway places. Some seeds are dispersed by water. These fruits or seeds usually develop floating ability in the form of spongy or fibrous outer coat as in coconut. Some seeds are dispersed by animals, especially spiny seeds with hooks which get attached to the bodies of animals and are carried to distant places. Examples are Xanthium and Urena. Some seeds are dispersed when the fruits burst with sudden jerks. The seeds are scattered far from the parent plant. This happens in the case of castor and balsam.

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

Column-I Column-II
(a) Bud (i) Maple
(b) Eyes (ii) Spirogyra
(c) Fragmentation (iii) Yeast
(d) Wings (iv) Bread mould
(e) Spores (v) Potato
(vi) Rose

Solution:

Column-I Column-II
(a) Bud (iii) Yeast
(b) Eyes (v) Potato
(c) Fragmentation (ii) Spirogyra
(d) Wings (i) Maple
(e) Spores (iv) Bread mould

10. Tick the correct answer:

(a) The reproductive part of a plant is the

(i) leaf (ii) stem (iii) root (iv) flower

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

(i) fertilisation (ii) pollination (iii) reproduction (iv) seed formation

(c) Mature ovary forms the

(i) seed (ii) stamen (iii) pistil (iv) fruit

(d) A spore-producing organism is

(i) rose (ii) bread mould (iii) potato (iv) ginger

(e) Bryophyllum can reproduce by its

(i) stem (ii) leaves (iii) roots (iv) flower

Solution:

a) (iv) flower

b) (i) fertilization

c) (iv) fruit

d) (ii) bread mould

e) (ii) leaves

Introduction to NCERT Solutions Class 7 Science Reproduction in Plants

Besides, this 12th chapter is quite important, so BYJU’S tailored perfect study materials to understand the concepts of Plant reproduction to score well in the examination. These notes cover the most import topics like types of reproduction, how plants reproduce, seed formation, seed dispersal, etc.

About Reproduction in Plants

The production of new offsprings from parents is known as reproduction. But reproduction in plants is a new concept for students of 7th standard. This chapter introduces the mode of reproduction in plants. Going further, this topic shed knowledge on sexual reproduction, fruits and seed formation and seed dispersal.

BYJU’S was created with a vision to offer world-class learning content for aspiring students who want to do well in exams. With the noble aim, the solutions that we provide have been designed to boost every student’s learning capabilities. The NCERT solutions which are a part of many solutions that we offer on our website has been thoughtfully developed to help students make the most out of it.

BYJU’S NCERT solutions for class 7 science offers several benefits to students who want to crack their exams. They can practice and revise the different topics right from their homes by downloading the chapter-wise PDFs. Students can also access these solutions from anywhere if they have an internet connection. They can further customise their learning experience and go through or solve all the questions at their own pace.

In addition to these solutions, BYJU’S offers some of the top subject experts with relevant experience to guide students and learn the subject in a more engaging, easy, detailed and clear manner. Students are also provided with regular feedback on their performance. We also have a responsive support team and students can approach them to clear all their doubts. Meanwhile, students can also have a glimpse of BYJU’S – The Learning app for a more efficient as well as fun learning experience.

Important topics covered in NCERT Solutions for Class 7 Science Chapter 12 Reproduction in Plants

  1. Sexual reproduction in plants
  2. Formation of fruits and seeds
  3. Dispersal of seeds

Frequently Asked Questions on Reproduction in Plants

What is vegetative propogation?

Production of new individuals from the vegetative part of parent is called vegetative propogation.

What is unisexual?

A flower may have either male or female reproductive parts. Such a flower is called unisexual.

Define Pollination?

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 Pollination.

Define Budding?

It involves the formation of a new individual from a bulb-like projection called a bud.

How process of fertilisation take place in flowers?

The process of fusion of male and female gametes (to form a zygote) is called fertilisation. The zygote develops into an embryo and embryo undergoes mitotic cell division to form seeds.

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