is the body or cells ability to seek and maintain equilibrium or stability in response to external changes.

Homeostasis is the body or cells ability to seek and maintain equilibrium or stability in response to external changes.

Explanation:

Homeostasis is a process through which a cell or entire body of an organism tends to attain it's original state by countering any external environmental change to which it is exposed. In simple words we can define homeostasis as a regulatory mechanism which helps a cell/organism to maintain constant internal environment.

For example during summer season when external environment gets extremely hot and temperature rises up to 45-48 °C in such condition our body's internal temperature which is normally 37 °C gets affected and tends to rise so as to attain equilibrium with the external environment. But if the internal temperature will rise more than optimum temperature i.e. 37 °C then our body's machinery will cease to work and it will die out if temperature will keep on rising. In such scenario to avoid temperature rise our body will use homeostasis mechanism to counter the change. In order to do so we have sweat glands. Our sweat glands will start secreting sweat as a result of which the external heat rather than raising our body's temperature will be used to evaporate water present in the sweat and we will be able to protect our body from harmful external environment.

car stops. he keeps going = he has inertia

bacteria that live on the ocean floor are sustained by phytoplankton. phytoplankton, microscopic marine photosynthetic organisms, have a vastly significant role to play not only in the marine food web of which they’re part of, but also on a more global scale. despite their infinitely small size in comparison to other marine organisms, these tiny creatures occupy an immensely important ecological niche: they are the foundation of the marine food web, and as primary producers, play key roles in supporting all other organisms in the marine environment, as well as in the regulation of the earth’s climate through the sequestration of carbon, oxygen production, and other related processes. phytoplankton account for roughly half of all global primary productivity; therefore, their significance extends far beyond the marine environment alone. there is an intriguing sense of irony in the realization that these tiny living beings that often live out their existence unnoticed and undetected by the rest of the world, have such a far-reaching impact on the lives of virtually all other living organisms on the planet, particularly on those in the marine environment. the world that we have become accustomed to has been and is continuously shaped by the workings of these miniscule yet vital “plants of the sea”.

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