NCERT Class 7 Science Reproduction in Plants

NCERT Class 7 Science Reproduction in Plants. Download NCERT Chapters and Books in pdf format. Easy to print and read. Copies of these textbooks may be downloaded and used as textbooks or for reference. Refer to other chapters and books at other links (NCERT now providing you soft copies of all textbooks of all subjects from class first to twelfth online). 

12 Reproduction in Plants

To produce its kind is a characteristic of all living organisms. You have already learnt this in Class VI. The production of new individuals from their parents is known as reproduction. But, how do plants reproduce? There are different modes of reproduction in plants which we shall learn in this chapter.

12.1 MODES OF REPRODUCTION

In Class VI you learnt about different parts of a flowering plant. Try to list the various parts of a plant and write the functions of each. Most plants have roots, stems and leaves. These are called the vegetative parts of a plant. After a certain period of growth, most plants bear flowers. You may have seen the mango trees flowering in spring. It is these flowers that give rise to juicy mango fruit we enjoy in summer. We eat the fruits and usually discard the seeds. Seeds germinate and form new plants. So, what is the function of flowers in plants? The flowers perform the function of reproduction in plants. Flowers are the reproductive parts of a plant. A flower may have either the male part or the female part or both male and female parts.

There are several ways by which plants produce their offspring. These are categorised into two types: (i) asexual, and (ii) sexual reproduction. In asexual  reproduction plants can give rise to newplants without seeds, whereas in sexual reproduction, new plants are obtained from seeds.

Asexual reproduction

In asexual reproduction new plants are obtained without production of seeds or spores.

Vegetative propagation

It is a type of asexual reproduction in which new plants are produced from roots, stems, leaves and buds. Since reproduction is through the vegetative parts of the plant, it is known as vegetative propagation.

Exercises

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 _____________.

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

3. Explain what you understand by sexual reproduction.

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

5. Sketch the reproductive parts of a flower.

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

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

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

9. 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


Please refer to attached file for NCERT Class 7 Science Reproduction in Plants

Tags: 

 


Click to View or Download pdf file
Click for more Science Study Material

Latest NCERT & CBSE News

Read the latest news and announcements from NCERT and CBSE below. Important updates relating to your studies which will help you to keep yourself updated with latest happenings in school level education. Keep yourself updated with all latest news and also read articles from teachers which will help you to improve your studies, increase motivation level and promote faster learning

Aryabhata Ganit Challenge 2020

Aryabhata Ganit Challenge (AGC) has been initiated by the CBSE Board to enhance mathematical abilities among students in the year 2019. In order to reach out to maximum students across the country, the Board will host the Aryabhata Ganit Challenge on DIKSHA platform...

What to do Post Receipt of Question Paper in the Board Examination

The intend of this article is to guide the students about the course of action they should follow once they receive the CBSE question papers in the school as well as board examination centre. Before initiating the examination there are few key aspects which the...

Gandhiji Quiz by CBSE

CBSE has launched a Quiz on Mahatma Gandhi. The quiz portal can be accessed on Discover Gandhi portal at: https://discovergandhi.in/ DIKSHA platform (https://diksha.gov.in) and the Discover Gandhi mobile App which can be easily downloaded from Google Play Store on...

Role of Word Limit in Written CBSE Examination

The intend of this article is to let us know the significance of writing within the prescribed word limit while attempting the CBSE Board Examination. Every single question in the board examination has a pre-specified word limit and every student needs to understand...

Ganga Utsav 2020 organized by NMCG

The National Mission for Clean Ganga (NMCG) is organising the annual ‘Ganga Utsav’ on November 2nd , 3rd & 4th, 2020 on a virtual platform. The Utsav will involve storytelling, folklores, & dialogues with eminent personalities, quizzes, display of traditional...

Five Tips for Brisk and Effective Revision for School and Board Examinations

The intend of this article is to present before you the 5 most efficient tips to facilitate the students to revise the entire course for the Annual School and Board Examination.  We are moving towards the upcoming examinations, almost all the academic institutions of...

×
Studies Today