9th Physics:Chapter Sound


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Obtaining and Utilization Food Class 7 Science Solved question (Basic Science Questions answers)

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A. Answer these questions 1. Name the three life process help living being to procure energy from food? Answer: Three life processes that help living organisms to procure energy from food are: (i) Digestion (Nutrition) (ii) Respiration (iii) Transportation 2. What are Autotrophs? Name an organism other than other than green plant that is an autotroph. Answer: Autotrophs are organisms that can prepare their own food. Chlamydomonas is a type of green algae which is an example of an autotroph, other than green plants. Cyanobacteria are also an example of autotroph. 3. Name three type of heterotrophic nutrition Answer: Three types of heterotrophic nutrition are: (i) Saprophytic nutrition (ii) Parasitic nutrition (iii) Holozoic nutrition 4. What are enzymes? Answer: Enzymes are chemical substances that act as biological catalysts and are important for carrying out biochemical processes, such as digestion, in our body ...
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Class9 Biology chapter Cell the Fundamental unit of life :Assignment solved

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1. What is plasma membrane? What are their functions? Ans: Plasma membrane also called as cell membrane, is the outer covering of a cell that separates the cell contents (protoplasm) from the surrounding medium. It is made up of proteins and lipids. It gives form (shape and size) to the cell It maintains the individuality of the cell (i.e. seperates cells) It keeps the cell contents in place 2. What are cell organelles ? Ans: The certain specific living parts of a cell with a definite function are celled Cell organelles. All cell are found to have same organelles and together these constitute to the basic unit of life. 3. What is cellulose and its functions? Ans: Cellulose is the main component of a plant cell wall. It is responsible for giving structural shape to the cell and also to protect the protoplasm. 4.  What is a Prokaryotic cell? Give an Example. Ans: The cells that do not hav...
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9th Atoms and Molecules Question bank By KV For CBSE Board

CHAPTER - 3 “Atoms and Molecules” 1. Laws of Chemical Combination 2. John Dalton's Atomic Theory 3. Atoms, ions & Chemical Formula 4. Mole Concept 5. Molar Mass & Avogadro constant Download Test Paper with solution CBSE Study By Jsunil ********************************************************************************* 1 Mark Questions: 1. Who gave law of conservation of mass ? 2. What term is used to represent the mass of 1 mole molecules of a substance? 3. What name is given to the number 6.023 x 10 23 ? 4. What is molecular mass? 5. Give Latin names for sodium & mercury. 6. *How many atoms are there in exactly 12 g of carbon ? 7. Define mole. 8. Calculate formula unit mass of CaCl2. [ At. Mass : Ca = 40 u , Cl = 35.5 u ] 9. Name a diatomic gas. 10. How many atoms are present in H 2 SO 4 . ...
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Transportation and Excretion 7th Biology Hots Solved Question

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1. Excretion is the removal of metabolic waste products called --------------- (Excreta) 2. The mammalian RBCs are without -------------------------- (nucleus) 3. The heart is covered by a protective double walled sac called -----------filled with ----------------( pericardium , pericardial fluid .) 4. The heart is made up of special type of muscles, called ------------ (cardiac muscles) 5. The separation wall between right and left side of heart is called ------------   (septum) 6. ------------ regulate the flow of blood unidirectional from right auricle to right ventricle and not backwards. (Valves) 7. Expanded condition of right and left ventricles when full of blood is called ----------------. (Diastole) 8 The state of contraction of of right and left ventricles is called -------- (systole) 9. ---------------- are thinnest blood vessel (Capillaries) 10. Except the -------------- veins all other veins carry deoxygenated blood.( pulmonary) 11....
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CBSE Class 9 - Biology - CH6 – Animal Tissues Trend Setter Solved Problems

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CBSE Class 9 - Biology - CH6 – Animal Tissues Trend Setter Solved Problems Q1: Based on functions performed, list the types of animal tissues. Answer: Four Category types: 1. Epithelial tissue 2. Connective tissue 3. Nervous tissue 4. Muscle tissue Q2: Which tissues are called covering or protective tissues? Answer: Epithelial Q3: Where do we find epithelial tissues on animal body? Answer: A few examples are:  skin  the lining of the mouth  the lining of blood vessels  lung alveoli  kidney tubules Q4: What are the general identifying features of epithelial tissues? Answer: 1. Tightly packed cells and form a continuous sheet. 2. Tissue is avascular i.e. without blood vessels. 3. All epithelium is usually separated from the underlying tissue by an extracellular fibrous basement membrane. Q5:Based on layer and shape of cells, how Epithelial tissues can be classified? Answer: 1. Squamous Epithelium 2. Cuboidal Epithelium 3. Colu...
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