what is peristomium describethe segment behind
What is peristomium. Describe?
The segment behind the prostomium in annelids which contains the oral opening. This segment like the prostomium isn't a true segment and has no setal hairs, which are characteristic of phylum.
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explain pedicellaria in briefdefensive pincerlike structures found on the surface of echinoderms they are capable of responding to external stimuli
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determine the meaning of prestressed concreteit is a type of concrete in which permanent internal stresses of a suitable nature magnitude and
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what is peristomium describethe segment behind the prostomium in annelids which contains the oral opening this segment like the prostomium isnt a
what is the significance of pharyngeal gill slitlateral opening in the wall of the pharynx which allows water to enter into the mouth and exit
what do you understand by pharynxthe region of digestive tract between the mouth and esophagus in most animals its muscular and forces food into the
what is placoid scale elaborate in detailscales characteristic of cartilaginous fish formed from the dermis scale is anchored in that layer by a
what is tendonand describe its working it is a steel element such as a wire cable bar or strand which is provided in a stretched form to impart
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