Class 9 Science Chapter 6 Tissues NCERT Solutions Page 69 1. What is a tissue? Answer: Tissue is a group of cells that are similar in structure and are organised together to perform a specific task. 2. What is the utility of tissues in multi-cellular organisms? Answer: In multicellular organisms, cells are grouped to form tissues. These tissues are specialised to … [Read more...] about Chapter 6 Tissues
NCERT Solutions
Chapter 5 The Fundamental Unit of Life
Class 9 Science Chapter 5 The Fundamental Unit of Life NCERT Solutions Page 59 1. Who discovered cells, and how? Answer: Cells were discovered in 1665 by an English Botanist, Robert Hooke. He used a primitive microscope to observe cells in a cork slice. 2. Why is the cell called the structural and functional unit of ? Answer: Cell is the smallest unit of life … [Read more...] about Chapter 5 The Fundamental Unit of Life
Chapter 4 Structure of the Atom
Class 9 Science Chapter 4 Structure of the Atom NCERT Solutions Page 47 1. What are canal rays? Answer: Canal rays are positively charged radiations. These rays consist of positively charged particles known as protons. They were discovered by Gold stein in 1886. 2. If an atom contains one electron and one proton, will it carry any charge or not? Answer: Since an … [Read more...] about Chapter 4 Structure of the Atom
Chapter 3 Atoms and Molcules
Class 9 Science Chapter 3 Atoms and Molecules NCERT Solutions Page 32, 33 1. In a reaction, 5.3 g of sodium carbonate reacted with 6 g of acetic acid. The products were 2.2 g of carbon dioxide, 0.9 g water and 8.2 g of sodium acetate. Show that these observations are in agreement with the law of conservation of mass. sodium carbonate + acetic acid → sodium acetate + carbon … [Read more...] about Chapter 3 Atoms and Molcules
Chapter 2 Is Matter Around Us Pure
Class 9 Science Chapter 2 | Is Matter Around Us Pure NCERT Solutions Page 15 1.What is meant by a substance? Answer: A pure substance is the one that consist of a single type of particle i.e. all constituent particles of the substance have the same chemical nature. 2. List the points of differences between homogeneous and heterogeneous … [Read more...] about Chapter 2 Is Matter Around Us Pure