Answer :
Final answer:
Mobile jaws are a feeding adaptation seen in certain animals like snakes which allows them to swallow larger prey. Kidneys help in regulating the body's water balance by filtering blood and adjusting the concentration of urine based on the body's needs.
Explanation:
The mobile jaws in certain animals are a unique adaptation that allow for specialized feeding. For instance, snakes can dislocate and extend their jaws to swallow prey significantly larger than their head. Kidneys, on the other hand, play a vital role in maintaining the body's water balance. The kidneys filter blood, removing waste while conserving essential ions and water. They can adjust the concentration of urine to either conserve or excrete water based on the body's needs, permitting a fine regulation of water balance.
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