SCIENCE
ZOOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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nothing
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the dart uncoils and buries itself into the skin of the animal; the cnidarian then dies (similar to a honey bee when it stings)
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the dart uncoils and buries itself into the skin of the animal; the unlucky animal is paralyzed or killed then eaten.
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the nematocyst triggers the tentacles to elongate and constrict around the animal like snakes
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Detailed explanation-1: -What happens when an animal touches a nematocyst? the dart uncoils and buries itself into the skin of the animal; the unlucky animal is paralyzed or killed then eaten. True or False: Cnidarians are soft-bodied animals with stinging tentacles arranged in circles around their mouths.
Detailed explanation-2: -It is a minute, elongated capsule produced in the cells called cnidoblasts of members of Phylum Cnidaria such as jellyfishes, and sea anemones. The nematocyst is produced in cnidoblast cells and contains a hollow coiled thread that secretes a poison to capture prey and protect from enemies.
Detailed explanation-3: -Cnidarians use nematocysts to catch their food. When touched, the nematocysts release a thread of poison that can be used to paralyze prey. Cnidarians are among the simplest of the so-called “higher” organisms, but are also among the most beautiful.
Detailed explanation-4: -NEMATOCYSTS STING WITH BULLET POWER Contact with a prey, or a diver, triggers a lightning-fast build-up of seawater inside the capsule, raising hydrostatic pressure to an immense level. The resulting spring action launches the dart with tremendous effect. It happens within a millionth of a second.
Detailed explanation-5: -Nematocysts or cnidocysts represent the common feature of all cnidarians. They are large organelles produced from the Golgi apparatus as a secretory product within a specialized cell, the nematocyte or cnidocyte. Nematocysts are predominantly used for prey capture and defense, but also for locomotion.