1. Name the process in which the simple molecules of nutrients break down to derive the energy to perform various activities is 1) digestion 2) respiration 3) circulation 4) excretion 2. Assertion (A): Mechanism of breathing vary among different groups of animals. Reason (R): Habitats and levels of organization are different among different groups of animals. 1) Both A and R are true and R is the correct explanation of A 2) Both A and R are true and R is not the correct explanation of A 3) A is true but R is false 4) A is false but R is true 3. Match the following and choose the correct option. Column – I(Organisms) Column – II (Respiratory structures) A) Coelenterates i) Tracheal tubes B) Annelids ii) Body surface C) Insects iii) Gills D) Aquatic arthropods iv) Moist cuticle 1) A - iv, B - ii, C - iii,...