Biology

Class 11 – Biology Chapter 12 – Mineral Nutrition Question 1.’All elements that are present in a plant need not be essential to its survival’. Comment. Answer : Most of the mineral elements present in the soil enter plants through…

Class 11 – Biology Chapter 11 – Transport in Plants Question 1.What are the factors affecting the rate of diffusion? Answer : Factors affecting the rate of diffusion are : Density – Rate of diffusion of a substance is inversely…

Class 11 – Biology Chapter 10 – Cell Cycle and Cell Division Question 1. What is the average cell cycle span for a mammalian cell? Answer : 24 hours. Question 2. Distinguish cytokinesis from karyokinesis. Answer : Differences between cytokinesis…

Class 11 – Biology Chapter 9 – Biomolecules Question 1. What are macromolecules ? Give examples. Answer : Macromolecules are large high molecular weight substances with complex molecular structure and occur in colloidal state (being insoluble) in intracellular fluid. These…

Class 11 – Biology Chapter 7 – Structural Organisation in Animals Question 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…

Class 11 – Biology Chapter 6 – Anatomy of Flowering Plants Question 1.State the location and function of different types of meristems. Answer : Meristems are of three types on the basis of their location in plant body: (i) Apical…

Class 11 – Biology Chapter 5 – Morphology of Flowering Plants Question 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 trees Answer : Roots…

Class 11 – Biology Chapter 4 – Animal Kingdom Question 1.What are the difficulties that you would face in classification of animals, if common fundamental features are not taken into account? Answer : The common fundamental features used for classifying…

Class 11 – Biology Chapter 3 – Plant Kingdom Question 1.What is the basis of classification of algae? Answer : Fritsch (1935), has classified algae considering phylogeny, affinities and inter-relationships of various forms. He classified algae mainly on the basis…

Class 11 – Biology Chapter 2 – Biological Classification 1.Discuss how classification systems have undergone several changes over a period of time? Soln. Biological classification is the scientific procedure of arranging organisms in a hierarchical series of groups and sub-groups…

Class 11 – Biology Chapter 1 – The Living World NCERT TEXTBOOK QUESTIONS SOLVED Question 1. Why are living organisms classified? Soln. Living organisms are classified because of the following reasons: (i) Easy identification. (ii)Study of organisms of other places.…