Anything that causes a living organism to react is called a Stimulus (plural is stimuli). All living things can evolve adaptations to their environment. Living things respond to stimulus- Class 6th Science Animation Even tiny bacteria can move toward or away from chemicals (a process called chemotaxis) or light (phototaxis). A unique ability to reproduce, ability to grow, ability to metabolize, ability to respond to stimuli, ability to adapt to the environment, ability to move and last but not the least an ability to respire. You see, with issues like this, one stumbles over the answer and even when the answer is delivered they tend to be vague. For example, if you walk outside on a very sunny day, your pupils will constrict to protect your eye from taking in too much light a… Living organisms also need to maintain a balance in the external environment too. All living things can use energy and are capable of metabolism. If a barefooted man steps on a sharp object like thorn, he quickly pulls away his foot from the sharp object. Response to external stimuli. Response: aggressive behaviour: makes a hissing noise, arches its back, hair stands on end. Some organisms (such as herbivores) respond to stimuli much quicker than others (such as plants). TEACHERS INFORMATION | TERMS OF USE | PRIVACY STATEMENT | ABOUT ESCHOOLTODAY. 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Response to stimuli. Our environment is constantly changing, and in order for us and other living things to survive those changes, we must be able to respond to them. Birds, insects, animals, trees, human beings, are a few examples of living things as they have the same characteristic features, like eating, breathing, reproduction, growth, and development, etc. Response to stimuli refers to a response to outside stimuli such as a noise or a smell. We call them unicellular organisms. If an opossum, for example, is suddenly startled, it will respond by 'playing dead'. Reproduction This way, the organism’s original balance is restored. When we breathe, our chest moves up and down, it makes it easier to point at a person and call him alive. All living things are capable of reproduction, which is the process by which living things give rise to offspring. For example, plants grow upwards by the stimulation of sunlight, an effect known as positive phototropism. All living things can detect and respond to environmental stimuli. That is to say, they possess certain characteristics of living things (they tend to infect other organisms) as well as non-living things (viruses cannot reproduce without a host). Sensitivity or Response to Stimuli. If a man touches a very hot object accidentally ,he quickly pulls his hand away from the hot object. Environmental stimuli might include temperature changes, smells that indicate a predator is nearby, or noises from distressed offspring. For example, a branch of biology called virology studies viruses, which exhibit some of the characteristics of living entities but lack others. The stimulus is heat and the man responds by moving his hand away from the hot object. All living things grow and develop. A polar bear, for example, will struggle to survive in a hot climate because the temperature will be too much for it. For example, Amoeba, Euglena, and bacteria. All right, let’s change the question. Living things reproduce, that is, they multiply. But what about a leaf? Example of RESPONSE TO STIMULI. For example, if a loud bang wakes you up in the night, the fright makes your heart beat faster, you breathe faster, and your heart pumps more blood to the brain. The Receptor (or sensor), The Control Center (Processor), and the Effector. Classifying living things into these categories is an important way for scientists to show how living things are related to each other. Response to stimuli is an important characteristic of life. It helps the organism to stay in balance. An example could be something scary. It is a term that refers to an organisms ability to respond to the outside environment. Other environmental factors include basic things such as heat, food, odors and sound. Living things are made up of a cell or cells. On the safe side, one can assume that if something can reproduce, it can be called alive or a living being. is an important characteristic of life. Usually, a stimulus is a product of change in an energy source or force, such as light, or sound, or heat.

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