Abdominal Thrusts or commonly referred to as the "Heimlich Maneuver". It is known as a method of aiding upper airway obstructions or "choking" for short. Upper airway obstruction can be caused by different foreign objects such as food. The Heimlich Maneuver was named after Dr. Henry Heimlich, who first described the maneuver in 1974.
B. Prey
The jellyfish is the predator because it just caught the fish and is about to eat the fish. The fish is the prey because it was caught and about to be eaten.
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Entropy of an isolated system either increases or remains constant. If there are no irreversibilities in an isolated system then its entropy will remain constant. But that is a hypothetical case. In real life case, there is always some irreversibility present in the system.
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Answer:
Cells protect their DNA by enveloping it in a nucleus
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