This book is Science for Tenth Class Part 3 — Biology, a revised edition by Lakhmir Singh and Manjit Kaur, published by S. Chand as per the rationalised NCERT/CBSE syllabus. It is an English medium (अंग्रेज़ी माध्यम) book, written entirely in English (Roman script), with no Hindi content. The Lakhmir Singh and Manjit Kaur science series is one of the most widely used names for CBSE Class 10, and this volume covers the biology portion of the Class 10 science course — life processes, control and coordination, how do organisms reproduce, heredity and evolution, and our environment along with the management of natural resources. Every topic is explained in simple language with clear labelled diagrams, followed by NCERT book questions with answers, case-based questions, Assertion-Reason questions, solved board papers, solved exercises and quick revision tips at the end of each chapter. Chapter-wise videos are available on YouTube (@schandschooleducation), and the book carries a hologram authenticity guide with a scratch-and-access code for simulations, solved board papers and solved exercises. Key Features: English medium book — complete content written in English (Roman script), no Hindi content By Lakhmir Singh and Manjit Kaur, published by S. Chand School Revised edition as per the rationalised NCERT/CBSE syllabus for Class 10 Part 3 of the Science series — covers the Biology portion NCERT book questions with answers Case-based questions included Assertion-Reason questions included Quick tips for easy revision with each chapter Scratch 'n access — simulations, solved board papers and solved exercises Scratch 'n win — prizes worth ₹1 crore on original books Chapter-wise videos on YouTube (@schandschooleducation) Covers life processes Covers control and coordination Covers how do organisms reproduce Covers heredity and evolution Covers our environment and management of natural resources Simple explanation with clear labelled diagrams throughout Suitable for CBSE Class 10 board exam preparation 'Science for Tenth Class Part 3 — Biology' लखमीर सिंह एवं मनजीत कौर द्वारा लिखी गई है और S. Chand द्वारा प्रकाशित है। यह संशोधित संस्करण रेशनलाइज्ड NCERT/CBSE पाठ्यक्रम के अनुसार कक्षा 10 के विज्ञान (Science) विषय के जीव विज्ञान (Biology) भाग हेतु तैयार किया गया है। इसमें जैव प्रक्रम, नियंत्रण एवं समन्वय, जीव जनन कैसे करते हैं, आनुवंशिकता एवं जैव विकास तथा हमारा पर्यावरण एवं प्राकृतिक संसाधनों का प्रबंधन कवर किया गया है, साथ ही चित्र सहित सरल व्याख्या, NCERT प्रश्नों के उत्तर, केस आधारित एवं Assertion-Reason प्रश्न, हल किए गए बोर्ड पेपर तथा YouTube पर अध्यायवार वीडियो भी उपलब्ध हैं। ध्यान दें: यह पुस्तक पूर्णतः अंग्रेज़ी भाषा एवं रोमन लिपि में है, हिन्दी में नहीं।