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CBSE Sample Paper for Class X Science
Time: 3hrs MM: 90 General instructions: The question paper comprises of two sections, A & B. you are to attempted both the sections. All the questions are compulsory. There is no overall choice. However, internal choice has been provided in all the five questions of five marks category. Only one option in each question is…
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Biology | Heredity and Variation
Heredity and Variation All members of a species have many characteristics in common, but no two individuals are exactly alike. The common characteristics are due to common heredity. These are transferred from parents to progeny via gametes. The differences are called variations and are caused by heritable mutations, i.e. sudden changed in the genetic material,…