Our Environment Previous Years Questions Choose the option giving correct matching the item given in Column I & II. a. A : (iii), B : (i), C : (iv), D : (ii)b. A : (iii), B : (iv), C : (i), D : (ii)c. A : (iii), B : (iv), C : (ii), D : […]
Life Processes Previous Years Questions : Solutions List the steps of preparation of temporary mount of a leaf peel to observe stomata. [CBSE 2018] [2Marks]Sol:The following steps of preparation of temporary mount of a leaf peel to observe stomata are : (i)Remove a healthy leaf from the plant.(ii)Remove a part of peel from the lower surface […]
Our Environment Notes Environment Everything that surrounds us is known as environment. Biodegradable Substance Substances that are broken down by biological processes are said to be biodegradable.e.g.: cotton, jute etc. Non-biodegradable Substance Substances that are not broken down by biological processes are said to be non-biodegradable.e.g.: plastic, metals etc. ➢ Micro organisms releases enzymes which […]
Control and Coordination – Important Questions Name one gustatory receptor and one olfactory receptor. How do auxins promote the growth of a tendril around a support? What is a nerve impulse? State the direction followed by a nerve impulse while travelling in the body of an organism.
Heredity and Evolution – Previous Years Questions In an experiment with pea plants, a sure tall plant (TT) is crossed with a pure short plant (tt). The ratio of pure tall plant to pure tall plant to pure short palnt in F2 generation will be a. 1 : 3b. 3 : 1c. 1 : 1d. […]
Heredity and Evolution – Notes Heredity:- The transmission of traits/characters from one generation to next generation is called heredity. Genetics:- The study of heredity and variation is called genetics. Dominant:- The characteristics which is expressed in an organism is called dominant. Recessive:- The trait which is not expressed in an organism is called recessive. Homozygous:- […]
Control and Coordination – Previous Years Questions Walking in a straight line and riding a bicycle are the activities which are possible due to a part of the brain. Choose the correct location and name of this part from the given table : [1 mark] [ CBSE 2023] How is an electric impulse created in […]
How do Organisms Reproduce – Previous Years Questions The thread like structure that develop on a moist slice of bread in Rhizopus are : a. Sporangia b. Filaments c. Rhizoids d. Hyphe [CBSE 2023] [1 Mark] Choose the correct order of the stages of binary fission in Leishmania. a. I, II, III, IV, Vb. I, […]
How do Organisms Reproduce – Important Questions Name the hormones responsible for the changes in boys and girls at the time of puberty. . Describe the various steps involved in the process of binary fission with the help of a diagram. Why do multicellular organisms use complex way of reproduction? . Describe the role of […]
How do Organisms Reproduce? – Notes Reproduction:- The process by which the organisms produce young ones of their own kind is called reproduction. Types of reproduction:- Asexual reproduction Sexual reproduction Asexual reproduction:- The type of reproduction in which a single parent is involved is called asexual reproduction. Types of asexual reproduction:- Fission:- The type of […]