1. Plants: Plants maintain homeostasis through a mechanism called phototropism. This response allows them to grow towards a light source to maximize their ability to photosynthesize. When a plant is exposed to light, the leaves receive an increased amount of chlorophyll, which triggers the production of energy-rich molecules through photosynthesis. As a result, the plant obtains energy and sustains its metabolic functions. However, if the light intensity becomes too high and threatens to damage the plant's cells, the plant responds by decreasing the absorption of light or redirecting it away from sensitive areas, hence avoiding excessive energy intake and maintaining homeostasis.
2. Bacteria: Bacteria are single-celled organisms that can adapt to a wide range of environments. They maintain homeostasis by utilizing a form of negative feedback called chemotaxis. Chemotaxis is the movement of bacteria in response to changes in chemical concentration within their environment. When bacteria encounter a favorable chemical gradient, they respond by moving towards the higher concentration of the substance, ensuring their survival and reproduction. However, if the concentration of the chemical becomes too high or toxic, the bacteria respond by moving away from that area, thus avoiding potentially harmful conditions. This feedback mechanism allows bacteria to adapt and maintain homeostasis by regulating their exposure to different chemical environments.
Take notes on the 2 non-human examples of living things maintaining homeostasis negative feedback
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