Introduction to Biotechnology Class 9 Science Notes Maharashtra State Board Tissue In the case of amoeba-like unicellular organisms, all functions are performed by organelles of that single cell. However, most of the organisms are multicellular. How are the various processes brought into their body? Groups of cells come together, to perform the various functions of … Read more
Heredity and Variation Class 9 Science Notes Maharashtra State Board Earlier, we have seen great variation within every species in nature. In this chapter, we shall study the factors that give rise to these variations. Inheritance The branch of biology which studies the transfer of characteristics of organisms from one generation to the next, and … Read more
Life Processes in Living Organisms Class 9 Science Notes Maharashtra State Board We have studied how digested food or oxygen inhaled by the lungs is transported to every cell of the human body. The farmer also tries to transport the water from wells or dams through a main channel to every plant. The food absorbed … Read more
Substances in Common Use Class 9 Science Notes Maharashtra State Board We use various substances in day-to-day life. We have previously learned in some detail about a few of them, their uses and constituents, and the method of their preparation. Important Salts in Daily Life The ionic compounds that do not contain H+ and OH– … Read more
Carbon: An Important Element Class 9 Science Notes Maharashtra State Board Carbon The element carbon is available abundantly in nature and occurs in free as well as in the combined state. In this chapter, let us study the properties of the non-metallic element carbon. Symbol of carbon – C Atomic number – 6 Atomic mass … Read more
Study of Sound Class 9 Science Notes Maharashtra State Board Sound is a form of energy that creates the sensation of hearing in our ears. This energy is in the form of waves. A medium is necessary for the propagation of sound waves. Sound waves give rise to a chain of compression (place of higher … Read more
Reflection of Light Class 9 Science Notes Maharashtra State Board Light is an agent which gives us information about what is happening in our surroundings. We can enjoy various wonders of nature like the sunrise, sunset, and rainbow only because there is light. Only because of light can we see the lush green vegetation, colourful … Read more
Information Communication Technology (ICT) Class 9 Science Notes Maharashtra State Board The term Information Communication Technology (ICT) includes communication devices and the use of those devices as well as the services provided with their help. The store of information generated due to the advances in science and technology is increasing at a tremendous rate. If … Read more
Environmental Management Class 9 Science Notes Maharashtra State Board Weather and Climate Atmospheric conditions at a specific time at a particular place are referred to as weather. Atmospheric conditions depend upon a variety of factors. We frequently express our opinion about the weather by making statements like, ‘Today, it is too cold’ or ‘It is … Read more
Useful and Harmful Microbes Class 9 Science Notes Maharashtra State Board Useful Micro-Organisms Lactobacilli Smear a drop of fresh buttermilk on a glass slide. Stain it with methylene blue and put a coverslip over it. Observe the smear under the 10X objective of a compound microscope and then with the more powerful 60X objective. Did … Read more