All the living organisms (plants and animals) respond and react to changes in the environment around them. The changes in the environment to which the organisms respond and react are called stimuli (singular of stimuli is stimulus). The living organisms show response to stimuli such as light, heat, cold, sound, smell, taste, touch, pressure, pain, water, and force of gravity, etc. The response of organisms to a stimulus is usually in the form of some movement of their body part. For example, if a man touches a very hot utensil accidently, he quickly pulls his hand away from the hot utensil. Here, heat is the stimulus and the man reacts by moving his hand away from the hot utensil. Similarly, when the sun is bright, we close our eyes. In this case, light is the stimulus and we react by closing the eyes.1. The changes in the environment to which the organisms respond and react are called stimuli. State true or false.(i) TRUE(ii) FALSE2. The response to stimuli is a characteristic property of the _______ organisms.(i) Non-living(ii) Living3.The animals can react to stimuli in many _______ ways.(i) Different(ii) Limited4. The plants react to stimuli in a ______way.(i) Different(ii) Limited5. State true or false. The working together of the various organs of an organism in a systematic manner so as to produce a proper response to the stimulus, is called coordination.(i) TRUE(ii) FALSE