Table Of ContentS. CHAND SCHOOL BOOKS
(An imprint of S. Chand Publishing)
A Division of S. Chand And Company Pvt. Ltd.
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© 1980, Lakhmir Singh & Manjit Kaur
All rights reserved. No part of this publication may be reproduced or copied in any material form
(including photocopying or storing it in any medium in form of graphics, electronic or mechanical
means and whether or not transient or incidental to some other use of this publication) without written
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notice.
Jurisdiction : All disputes with respect to this publication shall be subject to the jurisdiction of the
Courts, Tribunals and Forums of New Delhi, India only.
S. CHAND’S Seal of Trust
In our endeavour to protect you against counterfeit/fake books, we have pasted a holographic film
over the cover of this book. The hologram displays the unique 3D multi-level, multi-colour effects
of our logo from different angles when tilted or properly illuminated under a single source of light,
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First Published in 1980
Revised Edition 2014, 2016
Reprints 1981, 82, 83, 84, 85, 86, 87, 88, 89, 90 (Twice), 91 (Twice), 92 (Twice), 93, 94, 95, 96, 97,
98, 99, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2015,
2016 (Thrice)
ISBN : 978-93-525-3030-4 Code : 1003H 307
ABOUT THE AUTHORS
LAKHMIR SINGH did his M.Sc. from Delhi University in 1969. Since then he has been teaching in
Dyal Singh College of Delhi University, Delhi. He started writing books in 1980. Lakhmir Singh
believes that book writing is just like classroom teaching. Though a book can never replace a teacher
but it should make the student feel the presence of a teacher. Keeping this in view, he writes books in
such a style that students never get bored reading his books. Lakhmir Singh has written more than 15
books so far on all the science subjects: Physics, Chemistry and Biology. He believes in writing
quality books. He does not believe in quantity.
MANJIT KAUR did her B.Sc., B.Ed. from Delhi University in 1970. Since then she has been
teaching in a reputed school of Directorate of Education, Delhi. Manjit Kaur is such a popular science
teacher that all the students want to join those classes which she teaches in the school. She has a vast
experience of teaching science to school children, and she knows the problems faced by the children
in the study of science. Manjit Kaur has put all her teaching experience into the writing of science
books. She has coauthored more than 15 books alongwith her husband, Lakhmir Singh.
It is the team-work of Lakhmir Singh and Manjit Kaur which has given some of the most popular
books in the history of science education in India. Lakhmir Singh and Manjit Kaur both write
exclusively for the most reputed, respected and largest publishing house of India : S. Chand and
Company Pvt. Ltd.
AN OPEN LETTER
Dear Friend,
We would like to talk to you for a few minutes, just to give you an idea of
some of the special features of this book. Before we go further, let us tell you
that this book has been revised according to the NCERT syllabus prescribed
by the Central Board of Secondary Education (CBSE) based on new
“Continuous and Comprehensive Evaluation” (CCE) pattern of school
education. Just like our earlier books, we have written this book in such a
simple style that even the weak students will be able to understand biology
very easily. Believe us, while writing this book, we have considered
ourselves to be the students of Class X and tried to make things as simple as
possible.
The most important feature of this revised edition of the book is that we have
included a large variety of different types of questions as required by CCE for
assessing the learning abilities of the students. This book contains :
(i) Very short answer type questions (including true-false type questions
and fill in the blanks type questions),
(ii) Short answer type questions,
(iii) Long answer type questions (or Essay type questions),
(iv) Multiple choice questions (MCQs) based on theory,
(v) Questions based on high order thinking skills (HOTS),
(vi) Multiple choice questions (MCQs) based on practical skills in
science,
(vii) NCERT book questions and exercises (with answers), and
(viii Value based questions (with answers).
)
Please note that answers have also been given for the various types of
questions, wherever required. All these features will make this book even
more useful to the students as well as the teachers. “A picture can say a
thousand words”. Keeping this in mind, a large number of coloured pictures
and sketches of various scientific processes, procedures, appliances and
everyday situations involving principles of biology have been given in this
revised edition of the book. This will help the students to understand the
various concepts of biology clearly. It will also tell them how biology is
applied in the real situations in homes, transport and industry.
Other Books by Lakhmir Singh and Manjit Kaur
1. Awareness Science for Sixth Class
2. Awareness Science for Seventh Class
3. Awareness Science for Eighth Class
4. Science for Ninth Class (Part 1) PHYSICS
5. Science for Ninth Class (Part 2) CHEMISTRY
6. Science for Tenth Class (Part 1) PHYSICS
7. Science for Tenth Class (Part 2) CHEMISTRY
8. Rapid Revision in Science
(A Question-Answer Book for Class X)
9. Science for Ninth Class (J & K Edition)
10. Science for Tenth Class (J & K Edition)
11. Science for Ninth Class (Hindi Edition) : PHYSICS and CHEMISTRY
12. Science for Tenth Class (Hindi Edition) : PHYSICS, CHEMISTRY
and BIOLOGY
13. Saral Vigyan (A Question-Answer Science
Book in Hindi for Class X)
We are sure you will agree with us that the facts of biology are just the same
in all the books, the difference lies in the method of presenting these facts to
the students. In this book, the various topics of biology have been explained
in such a simple way that while reading this book, a student will feel as if a
teacher is sitting by his side and explaining the various things to him. We are
sure that after reading this book, the students will develop a special interest in
biology and they would like to study biology in higher classes as well.
We think that the real judges of a book are the teachers concerned and the
students for whom it is meant. So, we request our teacher friends as well as
the students to point out our mistakes, if any, and send their comments and
suggestions for the further improvement of this book.
Wishing you a great success,
Yours sincerely,
396, Nilgiri Apartments,
Alaknanda, New Delhi-110019
E-mail : [email protected]
DISCLAIMER
While the authors of this book have made every effort to avoid any mistake or omission and have
used their skill, expertise and knowledge to the best of their capacity to provide accurate and updated
information, the authors and the publisher do not give any representation or warranty with respect to
the accuracy or completeness of the contents of this publication and are selling this publication on the
condition and understanding that they shall not be made liable in any manner whatsoever. The
publisher and the authors expressly disclaim all and any liability/responsibility to any person,
whether a purchaser or reader of this publication or not, in respect of anything and everything
forming part of the contents of this publication. The publisher and authors shall not be responsible
for any errors, omissions or damages arising out of the use of the information contained in this
publication. Further, the appearance of the personal name, location, place and incidence, if any; in
the illustrations used herein is purely coincidental and work of imagination. Thus the same should in
no manner be termed as defamatory to any individual.
CONTENTS
FIRST TERM
1. LIFE PROCESSES
Characteristics of Living Things ; Life Processes : Nutrition, Respiration,
Transport, Excretion, Control and Coordination, Growth, Movement and
Reproduction ; Modes of Nutrition : Autotrophic and Heterotrophic
Modes of Nutrition ; Types of Heterotrophic Nutrition : Saprotrophic,
Parasitic and Holozoic Nutrition ; Nutrition in Plants : Photosynthesis ;
Conditions Necessary for Photosynthesis : Sunlight, Chlorophyll, Carbon
Dioxide and Water ; Experiments to Show That Sunlight, Chlorophyll
and Carbon Dioxide are Necessary for Photosynthesis ; Raw Materials
for Photosynthesis : Carbon Dioxide and Water ; Site of Photosynthesis :
Chloroplasts ; Nutrition in Animals : Herbivores, Carnivores and
Omnivores ; Nutrition in Simple Animals : Amoeba ; Nutrition in
Complex Multicellular Animals : Human Beings ; Human Digestive
System ; Dental Caries ; Breathing and Respiration ; How Energy
Released During Respiration is Stored : ATP; Types of Respiration :
Aerobic Respiration and Anaerobic Respiration ; Respiration in Plants :
Roots, Stems and Leaves ; Respiration in Animals : Amoeba, Earthworm
and Fish ; Respiration in Humans : Respiratory System in Humans ;
Experiment to Show That Carbon Dioxide is Produced During
Respiration ; Rate of Breathing ; Transport in Plants : Xylem and Phloem
; Blood and its Components ; Functions of Blood ; Transport in Humans :
Human Circulatory System ; Heart Beats and Pulse ; Blood Pressure and
its Measurement ; How do Food and Oxygen Reach Body Cells ;
Lymphatic System ; Excretion in Plants ; Excretion in Animals ;
Excretion in Humans : Human Excretory System ; Kidney Failure and
Dialysis
