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. Homeostasis—the ability to “stay the same”—is a feature shared by all living organisms. You go for a long walk on a hot day. Describe how homeostasis keeps your body healthy even though you are sweating profusely. Then describe an example of an adaptation that evolved in a desert plant or animal that allows them to survive in extreme temperature

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Answer:

To maintain homeostasis, the blood vessels in your skin dilate to allow more blood flow to the surface of your body where it disperses the heat. ... The evaporation of sweat and breathing out warm air also serve to help cool your body and thereby maintain a steady temperature.

Camels are well adapted for survival in the desert. Their adaptations include:

  • large, flat feet - to spread their weight on the sand
  • thick fur on the top of the body for shade, and thin fur elsewhere to allow easy heat loss
  • a large surface area to volume ratio - to maximise heat loss
  • the ability to go for a long time without water - they lose very little water through urination and perspiration
  • the ability to tolerate body temperatures up to 42°C
  • slit-like nostrils and two rows of eyelashes - to help keep out sand

Cacti are also well adapted for survival in the desert. Their adaptations include:

  • stems that can store water
  • widespread root systems that can collect water from a large area

In addition, cacti have spines instead of leaves. These minimise the surface area and so reduce water loss by transpiration. The spines also protect the cacti from animals that might eat them.

The stems of cacti are able to store water

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