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 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 10: Cell Cycle and Cell Division
NCRT TEXTBOOK QUESTIONS SOLVED 1. What is the average cell cycle span for a mammalian cell?Solution: 24 hours. 2. Distinguish cytokinesis from karyokinesis.Solution: Differences between cytokinesis and karyokinesis are: 3. Describe the events taking place during the interphase.Solution: The interphase,…
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 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 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 6: Anatomy of Flowering Plants
1.State the location and function of different types of meristems.Soln. Meristems are of three types on the basis of their location in plant body:(i) Apical meristem: It is present at the apices of root and shoot and is…
Chapter 5: Morphology of Flowering Plants
1.What is meant by modification of root? What type of modification of root is found in the:(a) Banyan tree(b) Turnip(c) Mangrove treesSoln.Roots of some plants change their shape and structure and become modified to perform certain functions…
Chapter 4: Animal Kingdom
NCRT TEXTBOOK QUESTIONS SOLVED 1.What are the difficulties that you would face in classification of animals, if common fundamental features are not taken into account?soln. The common fundamental features used for classifying animals include body symmetry, arrangement of…
Chapter 3: Plant Kingdom
NCERT TEXTBOOK QUESTIONS SOLVED 1.What is the basis of classification of algae?soln. Fritsch (1935), has classified algae considering phylogeny, affinities and inter-relationships of various forms. He classified algae mainly on the basis of the characters like structure of…
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