OESOPHAGUS STOMACH
ECHINODERMS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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It burrows into sand
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It injects poisoned spines into attackers
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It ruptures, expelling toxic internal organs
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It practices autonomy by severing its ray
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Detailed explanation-1: -As starfish have no central nervous systems, their behaviors are the result of certain self-organization processes. Starfish have hierarchically constructed motor organs consisting of arms and tube feet. The collective behavior of the tube feet does not function only as simple fluctuations in the arms’ coordination.
Detailed explanation-2: -Echinoderms and flatworms are groups of animals that have this ability. The starfish, for example, when damaged, can regenerate itself, and the lost part originates a new being.
Detailed explanation-3: -Predator evasion Autotomy is understood to serve a defensive function in starfish. While arms can be pulled off the starfish body by predators, the starfish can choose to shed its arm in order to evade danger. If the detached limb is eaten or extremely damaged, bidirectional regeneration is unlikely.
Detailed explanation-4: -The main worldwide threat to starfish is thought to be sea star wasting (SSW) disease, also called sea star wasting syndrome (SSWS). While this is a problem in its own right, it can also be linked to other threats including rising sea temperatures due to climate change.