OESOPHAGUS STOMACH
ECHINODERMS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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its growth hormones have been suppressed
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the appendage was lost and is regenerating
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its tube feet are not functioning
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the arm is not really needed
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Detailed explanation-1: -You notice that a sea star in an aquarium has one very short arm. The best explanation for this is that ? The appendage was lost and is regenerating.
Detailed explanation-2: -Sea stars can regrow a lost arm as long as some part of the central disk, or the middle of their bodies, remains intact. If any of a sea star’s arms are injured, bitten or broken off, tissues at the injury site seal themselves off, then special cells migrate to the area and slowly begin to regrow the arm.
Detailed explanation-3: -If a sea star gets an arm gets cut off then they can regenerate the separate arm. If the separate arm carries a portion of the central disk it can create a whole new sea star.
Detailed explanation-4: -What happens when the arms of a sea star are joined together? It makes the basic shape of a sea urchin.
Detailed explanation-5: -At the tip of each arm sits a tiny compound eye composed of ommatidia, which are clusters of photoreceptor cells.