Reproduction in Plants NCERT Solutions – Class 7 Science

Reproduction in plants is one of the most vital chapters of Class 7 Science. It has many complicated concepts which require a clear understanding.  We recommend Extramarks  NCERT Solutions for Class 7 Science Chapter 12 that will help students to get an overview of the chapter with diagrams and illustrations to retain information and help them excel in their exams. Extramarks offers clear and concise solutions for students’ reference. Students can refer to these during their exam preparations, revisions, and  even help with their assignments. It’s beneficial for all the students irrespective of their level.

NCERT Solutions for Class 7 Science Chapter 12 

Access NCERT Solutions For Class 7 Science Chapter No. 12 – Reproduction in Plants

Why do we Need NCERT Solution for Class 7th Science Chapter 12 Reproduction in Plants?

Exam preparation for any subject isn’t complete if you haven’t solved or at least glanced through NCERT questions. Many of the exam questions that students face follow a very similar pattern to the questions given in the NCERT textbook.

This is what makes NCERT Solutions For Class 7 Science Chapter 12 an exceptional and unique learning resource for students.  While the syllabus is vast, glancing through these solutions will give students a lot of confidence in facing their exam questions and how to frame the right answer.  It will also encourage and motivate the students to aim higher and be proud of themselves. To stay curious and enjoy the process of learning without feeling stressed or anxious. Hang on there is more to it. These solutions are available online as well as offline.

Enhanced Learning with Proper Diagrams

NCERT Solutions For Class 7 Science Chapter 12 are curated by subject matter experts that take special care in drafting these solutions. They make sure to provide accurate and thorough solutions with proper explanations, examples, and diagrams wherever required. This not only enhances the student’s understanding of concepts but also gives them an idea of how they can write answers in their final exams  and   come out with flying colours.

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NCERT Solutions for Class 7 Science Chapter 12 Reproduction in Plants

Reproduction in plants is nothing but the production of new offspring in plants. In the chapter, students will learn about the two kinds of reproduction in plants namely, sexual reproduction and asexual reproduction.

Some of the important topics in this chapter include modes of reproduction, ways of sexual reproduction, vegetative propagation, pollination, fertilisation, fragmentation, spore formation, fruits and seed formation, and seed dispersal.

Q.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 _____________.

Ans-

(a) Vegetative propagation
(b) Unisexual flower
(c) Self-pollination
(d) Fertilisation
(e) wind, water and animals

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

Ans-

There are four different methods of asexual reproduction which are as follows:

Fragmentation- In this process, an organism, like algae, breaks down into two or more fragments and each fragment gives rise to a new individual. For example, Spirogyra undergoes fragmentation as shown below:


Budding- In this process,a small bulb-like projection emerges from the mother cell that grows and develops into a new individual. Yeast undergoes budding to reproduce asexually that takes place in the following manner:

Spore formation- Most of the fungi reproduce asexually by forming tiny spores, which germinate to give rise to new individuals in the following manner

Vegetative propagation- It is seen in many plants in which vegetative plant parts give rise to new plants. For example, leaf of Bryophyllum and eyes of potato form new plants as shown below

Q.3 Explain what you understand by sexual reproduction.

Ans-

Sexual reproduction is the process of producing offspring by an organism with involvement of male and female sexes. It involves fusion of male and female gametes that leads to the formation of zygote. The male and female gametes are produced by male and female flower parts, respectively. Male part of the plant is stamen that bears male gametes inside the pollens and female part of the plant is pistil that bears ovary containing female gamete or ovum. Pollens fall on stigma of the flower and germinate to form pollen tubes containing male gametes. Pollen tube enters the ovary releasing male gametes. One of the gametes fuses with ovum and undergo fertilisation to form zygote, completing the process of sexual reproduction.

Sketch the reproductive parts of a flower.

 

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

Ans-

In asexual reproduction, single parent gives rise to the offspring without producing seeds whereas, in sexual reproduction two parents of opposite sex participate to produce a seed from which a new individual emerges.

Q.5 Various male and female reproductive parts of the flower can be sketched as follows:

Ans-

Q.6 How does the process of fertilisation take place in flowers?

Ans-

The process of fertilisation takes place after pollination. Pollens on reaching the stigma of the flower germinate to form pollen tubes that carry male gametes. One of the male gametes fuses with female gamete on reaching ovary forming zygote.

Q.7 Explain the difference between self-pollination and cross-pollination.

Ans-

In self-pollination, the pollens are deposited on the stigma of either the same flower or another flower on the same plant. In cross-pollination, pollens are deposited from one flower to another flower of the same kind, borne on another plant.

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

Ans-

Seed are carried by wind, water and animals for dispersal.

1. Some seeds, which are light and have wings or hair, are easily carried away by wind. For example, seeds of maple have wings and seeds of madar have hair.
2. Some other seeds develop thick fibrous coating to acquire floating ability and are dispersed by water. For example, coconut seed has fibrous seed coat.
3. Some other plants produce seeds with hook-like structures or spines with the help of which they get attached to the bodies of animals and disperse to larger distances. For example, seeds of Xanthium and Urena have hooks and spines.

Q.9 Match items in Column I with those in 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

Ans-

The correctly matched contents of Column I with Column II are as follows:

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

Q.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

Ans-

(a) The reproductive part of a plant is the (iv) flower.
(b) The process of fusion of the male and the female gametes is called (i) fertilisation.
(c) Mature ovary forms the (iv) fruit.
(d) A spore producing plant is (ii) bread mould.
(e) Bryophyllum can reproduce by its (ii) leaves.

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FAQs (Frequently Asked Questions)

Sexual reproduction is the process through which plants reproduce. The male and the female gametes of the plants fuse to produce what is known as a zygote. This further develops into a new plant through the process of sexual reproduction. The new plant is distinct in many aspects from its parents.

Reproduction in plants covers a wide range range of topics such as vegetative propagation, modes of asexual reproduction, fragmentation, spore formation, budding, fertilisation, pollination, and many more. The reproduction in plants chapter deals with various ways of reproduction and must be understood well. To comprehend these concepts well, you can check out the NCERT Solutions Class 7 at Extramarks.

The best way to prepare the chapter would be to first go through the entire chapter on your own.. Then try to answer all the textbook questions yourself.  Next, go through the entire exercise without the help of solutions. Once you are done, then pick up NCERT Solutions for Class 7 Science Chapter 12 by Extramarks and cross check all your answers. Pay  close attention to how subject experts have framed the solutions and try to incorporate the same  in your answers. . This will definitely help you to  write  better answers  in your  final exams as well.

Extramarks takes utmost care in maintaining the quality of these solutions. All the solutions are prepared by subject matter experts with  years of experience in their respective fields. They work conscientiously and diligently to prepare authentic, concise answers  with thorough explanations with examples, illustrations etc.so that students can understand better. Also, this way students  know how to write  in final exams to score well in academics.