Microscopic stalked pincer-like structures present in echinoderms are_________.
A
Tube feet
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B
Spines
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C
Pedicellariae
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D
Ossicles
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Solution
The correct option is C Pedicellariae
The skin of echinoderms is filled with thousands of nerves.
The skin and the nervous system help protect the internal skeleton, which in many species consists of calcium-impregnated plates.
As the animal grows, the plates expand to support and shape the body.
The spines found in many species are attached to those plates.
The bodies of some species are covered by tiny, pincer-like organs called pedicellaria which are used in defense and to help echinoderms clean their own skin.