2022_심화영어

Where are immortal jellyfish found? Immortal jellyfish are thought to have originated in the Mediterranean Sea; however, they are now found in oceans all around the world. It is thought this recently noticed invasion may have been predominantly caused by humans. A prevailing theory is that ships are responsible for spreading the creatures throughout Earth’s oceans. Ballast water is pumped in and out of vessels like cargo and cruise ships to maintain stability. It is highly possible that immortal jellyfish get drawn in with this water and are able to survive ocean crossings thanks to their ability to reverse their life cycle when they experience stresses, such as a lack of food. The inconspicuous nature of immortal jellyfish aids their global spread. These tiny, transparent creatures vary in appearance by location: Turritopsis dohrnii in hot regions like Panama have around eight tentacles, compared to 24 or more in milder waters like the Mediterranean and Japan. The reasons for these variations remain unclear. Their adaptability allows them to thrive in diverse environments and survive under stressful conditions such as food scarcity, contributing to their successful colonization of oceans worldwide. 05 10 15 Inferencing refers to using words or expressions in context as clues to get a deeper understanding of the text. Tip Reading Ballast water is fresh or salt water held in the tanks and cargo holds of a ship. It is used to provide stability and mobility during a journey. How do immortal jellyfish survive ocean crossings? Q4 originate predominantly prevailing hitchhiker ballast vessel cargo cruise reverse inconspicuous tentacle whereas New Words The Secret to Immortality 49