EVERYDAY SCIENCE

Detailed explanation-1: -Anything that causes a living organism to react is called a stimulus. All living organisms respond to their environment. Response to stimuli is an important characteristic of life.

Detailed explanation-2: -Response to Stimuli All living things detect changes in their environment and respond to them. A response can take many forms, from the movement of a unicellular organism in response to external chemicals (called chemotaxis), to complex reactions involving all the senses of a multicellular organism.

Detailed explanation-3: -The ability of an organism to respond to external stimuli is called sensitivity. For example, Plants grow towards light(external stimuli) sources, and if the direction of light is changed, the plant will also change its direction of growth to accommodate for survival.

Detailed explanation-4: -All organisms, from the prokaryotes to the most complex eukaryotes can sense and respond to environmental stimuli. Consciousness and response to external stimuli is the defining property of living organisms.

Detailed explanation-5: -All living things are made of cells, use energy, respond to stimuli, grow and reproduce, and maintain homeostasis.