Fill in the blanks and rewrite the statements: Heredity and Evolution One Mark questions answers (1) Johann Gregor Mendel is pioneer of the modern genetics. (2) Heredity is the transfer of biological characters from one generation to another via genes. (3) Each mRNA is made up of thousands of triplet codons . (4) Vertebrates have … Read more
Dear students, sharing with you Science Quiz. This quiz will help you for preparing for your exams
Can you recall? (Textbook page no. 30) 1. What are the types of molecules of elements and compounds? The molecules of an element are made of one or more atoms that are exactly alike whereas, the molecules of compound are made up of atoms of different types. 2. What is meant by valency of elements? … Read more
PERIODIC CLASSIFICATION OF ELEMENTS NOTES Basic concepts – Matter – It is anything around us which has mass and which occupy space States of matter: – Solid Liquid Gas Plasma state (Occurs at extremely high temperature – 11,000° – 14,500° Fahrenheit or 150 million degrees Celsius) Bose Einstein condensates (temperatures very close to absolute zero … Read more
LIFE PROCESSES IN LIVING ORGANISMS PART 1 How are the food stuffs and their nutrient contents useful for body? The food stuffs are digested and converted into soluble nutrients. Carbohydrates & fats provide energy Proteins are the structural components of cells Vitamins & Minerals perform function of Protection and regulation. The nutrients are carried by … Read more
HEREDITY AND EVOLUTION EXERCISE QUESTIONS Q.2 Read the following statements and justify a) Human evolution began approximately 7 crore years ago. The last dinosaurs disappeared approximately 7 crore year ago due to changes in environmental conditions. Monkey like animals evolved from lemur – like ancestors 4 crore years ago – The tail of these … Read more
Life Processes 1 Test Answers Q.1. (A) Choose and write the correct option: (5 Marks) Water content of Blood Plasma is ……………… . 70% 90% 65% 50% In which part of cell, electron transfer chain reaction occurs? Cytoplasm Mitochondria Nucleus Golgi body Which of the following protein is present in skin? Haemoglobin Insulin Keratin Ossein … Read more
FORCE – Any push or pull on an object is called force. OR It is the physical quantity that changes or tends to change the state of rest or of motion. EFFECTS … Read more
1. Study the entries in the following table and rewrite them putting the connected items in a single row. GRAVITATION EXERCISE QUESTIONS 2. Answer the following questions. a. What is the difference between mass and weight of an object. Will the mass and weight of an object on the earth be same as their values … Read more
Life Processes 1 Test. Dear students, sharing with you Life Processes 1 Test. This will help you for preparing for board exam. Q.1. (A) Choose and write the correct option: (5 Marks) Water content of Blood Plasma is ……………… . 70% 90% 65% 50% In which part of cell, electron transfer chain reaction occurs? Cytoplasm … Read more