Why is it necessary for organisms to use feedback systems to maintain homeostasis? A. Because the internal environment of their systems doesn't change much.

B. Because the internal and external environments that organisms are exposed to are constantly changing and they need a way to respond.

C. Because enzymes only work in specific pH and temperatures.

D. Because ATP is scarce in natural systems, and feedback systems provide the quickest way to get energy efficiently.

explanation:

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measuring physical properties lab reportinstructions: in the physical properties lab, you will test the physical properties of different building materials in order to pick the appropriate materials for a new home in tiny world. record your observations and test measurements in the lab report below. youwill submit your completed report.name and title: lyric lawton, mr.herbert, 10/13/17, physical properties lab. objective(s): i need to parvus build his house out of the right material, so he will stay cool in the mountains.hypothesis: if we use wood to build the roof of the house, then the temperature inside the house will remain cooler.if we use clay brick to build the walls and floors of the house, then the temperature inside the house will remain cooler.if we use aluminium to bring electricity into the home, then it will allow electricity to flow into the home at a faster rate.if we use iron to construct the latches on the windows and doors, then the magnetism will keep the latches secure.