Chapter 19: Excretory Products and their Elimination
NCERT TEXTBOOK QUESTIONS FROM SOLVED 1.Define Glomerular Filtration Rate (GFR).Solution. The amount of filtrate formed by the kidneys per minute is called glomerular filtration rate (GFR). It is approximately 125 mL/min. in a healthy person. 2.Explain the autoregulatory…
Chapter 20: Locomotion and Movement
NCERT TEXTBOOK QUESTIONS FROM SOLVED 1. Draw the diagram of a sarcomere of skeletal muscle showing different regions.Solution: 2. Define sliding filament theory of muscle contraction.Solution: According to sliding filament theory of muscle contraction, the actin and myosin…
Chapter 21: Neural Control and Coordination
NCERT TEXTBOOK QUESTIONS FROM SOLVED 1. Briefly describe the structure of the following:(a) Brain (b) Eye (c) EarSolution: (a) Brain: The brain acts as control and command system of the body. It is protected by skull and is covered…
Chapter 18: Body Fluids and Circulation
1. Name the components of the formed elements in the blood and mention one major function of each of them.Solution: Blood corpuscles are the formed elements in the blood, they constitute 45% of the blood. Formed elements are…
Chapter 7: Structural Organisation in Animals
1. Answer in one word or one line.(i) Give the common name of Periplaneta americana.(ii) How many spermathecae are found in earthworm?(iii) What is the position of ovaries in cockroach?(iv) How many segments are present in the…
Chapter 8: Cell The Unit of Life
NCRT TEXTBOOK QUESTIONS SOLVED 1.Which of the following is not correct?(a) Robert Brown discovered the cell.(b) Schleiden and Schwann formulated the cell theory.(c) Virchow explained that cells are formed from pre-existing cells.(d) A unicellular organism carries out…
Chapter 9: Biomolecules
NCRT TEXTBOOK QUESTIONS SOLVED 1. What are macromolecules? Give examples.Solution: Macromolecules are large high molecular weight substances with complex molecular structure and occur in colloidal state (being insoluble) in intracellular fluid. These are formed by polymerization of large…
Chapter 11: Transport in Plants
1.What are the factors affecting the rate of diffusion?Solution. Factors affecting the rate of diffusion are : 2.What are porins? What role do they play in diffusion?Solution: The porins are proteins that form huge pores in the outer membranes…
Chapter 12: Mineral Nutrition
1.’All elements that are present in a plant need not be essential to its survival’. Comment.Soln. Most of the mineral elements present in the soil enter plants through roots but all of these may not be essential for…
Chapter 13: Photosynthesis in Higher Plants
1. By looking at a plant externally can you tell whether a plant is C3 or C4 ? Why and how?Solution: It is not possible to distinguish externally between a C3 and C4 plant, but generally tropical plants are adapted for…
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