NOTES/SOLVED EXERCISES: GENERAL SCIENCE-7 PTB PUNJABTEXT BOOK BOARD LAHORE PAKISTAN 2015-16 (NEW COURSE)
NOTES/SOLVED EXERCISES: GENERAL SCIENCE-7 PTB PUNJABTEXT BOOK BOARD LAHORE PAKISTAN 2019 (NEW COURSE) CH:1 HUMAN ORGAN SYSTEMS P:3-13 3- GIVE SHORT ANSWERS: QUESTION No. i- How does carbon dioxide produce in our Body? ANSWER: Production of carbon dioxide: Carbon dioxide is the waste gas that is produced when carbon is combined with oxygen as part of the body’s energy-making process […]
» Read more