Author of this website, Mrs Shilpi Nagpal is MSc (Hons, Chemistry) and BSc (Hons, Chemistry) from Delhi University, B.Ed (I. P. University) and has many years of experience in teaching. The male reproductive system is an important concept that is often asked in the exam. From an examination perspective, the nitrogen cycle is a frequently asked topic – either as a theoretical question or a diagrammatic one. (2) There are certain bacteria which convert this inert nitrogen into nitrates and nitrites which can be taken up and used to make required molecules. The diagram of cell structure is quite easy to recreate, though a little practise may be required. The diagram of the water cycle is useful for both Class 9 and 10. She has started this educational website with the mindset of spreading Free Education to everyone. Thank you. However, the abundant nitrogen in the atmosphere cannot be used directly by plants or animals. Really helped me to do my assignment, Your email address will not be published. The cell structure is an important concept in Biology. An important point to note is the cell organelles – ensure that all the cell organelles are incorporated in the diagram. Hence, ensure that enough time is devoted to practising and perfecting the diagram. Really well explained point by point, thank you. Last Updated on February 5, 2020 By Mrs Shilpi Nagpal 3 Comments. The nitrogen cycle is an important biogeochemical cycle required for all life on earth. The following are a list of diagrams deemed important for Class 9 Exams. Filed Under: Class 9, Natural resources Tagged With: biochemical cycle, evaporation, hydrosphere, water cycle About Mrs Shilpi Nagpal Author of this website, Mrs Shilpi Nagpal is MSc (Hons, Chemistry) and BSc (Hons, Chemistry) from Delhi University, B.Ed (I. P. University) and has many years of experience in teaching. To explore other important diagrams for class 9 science, register at BYJU’S Biology. From an academic perspective, it is essential to learn about its structure and function as it forms the basis for one of the life processes – reproduction. (5) When animals consume plant matter,they break down the plant’s nitrogenous compounds and use them to form new animal proteins. Diagram Of Water Cycle It is required for the survival of all life on earth. (7) Plants can then assimilate this ammonium ion or still other bacteria can change it to nitrate by nitrification. Required fields are marked *. Filed Under: Class 9, Natural resources Tagged With: ammonification, denitrification, nitrification, nitrogen, nitrogen cycle About Mrs Shilpi Nagpal Author of this website, Mrs Shilpi Nagpal is MSc (Hons, Chemistry) and BSc (Hons, Chemistry) from Delhi University, B.Ed (I. P. University) and has many years of experience in teaching. However, with enough practice, it can be recreated with ease. Your email address will not be published. Questions, many of which have considerable weightage, are asked from this concept. From an examination perspective, the nitrogen cycle is a frequently asked topic – either as a theoretical question or a diagrammatic one. From an academic perspective, the carbon cycle is an important topic asked in the exam. Filed Under: Class 9, Natural resources Tagged With: ammonification, denitrification, nitrification, nitrogen, nitrogen cycle. The digestive system is one of the most important systems in the human body. It is one of the few important topics which are repetitively asked in the board examinations. Special care should also be given to ensure that the flow (or direction) of the arrows is accurate. (6) After an animal excretes urea or uric acid or after an animal or plant dies,certain bacteria carry out ammonification ie they produce ammonium ions from nitrogen containing molecules. When it comes to drawing the diagram, it is moderately difficult to recreate the image. Diagrams for Class 9 encompasses many topics – from human anatomy to genetics. From an academic perspective, the digestive system is a topic that is often asked in the exams – either as an illustration, theoretical questions, or both. However, it should be fairly easy to comprehend the topic and recreate the necessary diagrams. (3) During lightning the high temperature and pressure created in the air converts nitrogen into oxides of nitrogen.These oxides dissolve in water to give nitric and nitrous acid and fall on land along with rain. Just like the nitrogen cycle, the carbon cycle is an important biogeochemical cycle. It is found in alkaloids,urea. Your email address will not be published. The nitrogen cycle is an important biogeochemical cycle required for all life on earth. Question 5 Name a nitrogen fixing bacteria of non-leguminous plants? 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The process of ammonia formation is called ammonification.Some micro-organism(nitrobacteria, nitrosomonas)convert ammonia into nitrates.The process is called nitrification. Photosynthesis is one of the most important concepts in Class 9 Science. There are certain bacteria which reduce nitrates back to nitrogen or to ammonia or to some other oxides.This process is called denitrification.