Exercise : Solution of Questions on page Number : 226 Answer: 1 The functional unit of the environment consisting of living and non-living components is called an ecosystem. Answer: 2 …
Exercise : Solution of Questions on page Number : 191 Answer: 1 Maximum variations in the offsprings occur in the process of sexual reproduction. Answer: 2 In ears, free earlobes …
Exercise : Solution of Questions on page Number : 92 Answer: 1 Plant hormones are chemical substances which bring about the control and coordination in plants. Answer: 2 Abscisic acid …
Exercise : Solution of Questions on page Number :23 Answer 1: Food is the basic requirement of all living organisms for obtaining energy. Answer 2: Chemical energy is used by …
Exercise : Solution of Questions on page Number : 141 Answer: 1 The process of reproduction ensures that a plant or animal species does not disappear from Earth. Answer: 2 …