Balbharti Maharashtra State Board Class 10 Science Solutions Part 2 Chapter 1 Heredity and Evolution Notes, Textbook Exercise Important Questions and Answers. Maharashtra State Board Class 10 Science Solutions Part 2 Chapter 1 Heredity and Evolution Question 1: Complete the following diagram. ANSWER: Question 1: Read the following statements and justify same in your own words with the help of suituble examples. a. Human evolution began approximately 7 crore years ago. ANSWER: The dinosaurs became extinct around 7 crore years ago and from that point human evolution began. Humans are thought to have evolved from monkey like animals which looked more or less like modern lemurs. These monkey like animals further evolved into ape like animals. Some of these ape like animals evolved into gibbon and orangutan while rest of them evolved into gorilla and chimpanzees.From their evolved, the first human like animal called Ramapethicus . The following table lists the evolutionary history
Balbharti Maharashtra State Board Class 10 Science Solutions Part 1 Chapter 3 Chemical Reactions and Equations Notes, Textbook Exercise Important Questions and Answers. Maharashtra State Board Class 10 Science Solutions Part 1 Chapter 3 Chemical Reactions and Equations Question 1: Choose the correct option from the bracket and explain the statement giving reasons : (Oxidation, displacement, electrolysis, reduction, zinc, copper, double diplacement, decomposition) a. To prevent rusting, a laver of ……… metal is applied on iron sheets. Answer: zinc b. The conversion or ferrous sulphate to ferric sulphate is …….. reaction. Answer: oxidation c. When electric current is passed through acidulated water …….. of water takes place. Answer: electrolysis d. Addition of an aqueous solution of ZnSO 4 to an aqueous solution of BaCl 2 is an example of ……… reaction. Answer: double displacement Question 2: a. What is the reaction called when oxidation and reduction take place simul