Fill in the table, with the appropriate characteristics for each class of echino

Question

Fill in the table, with the appropriate characteristics for each class of echinoderms covered to compare the adaptations to different lifestyles among members of these groups.

adaptations to different lifestyles among members of these groups. Table 14-5 Comparison of Major Characteristics among Echinoderm Classes Class Characteristic Crinoidea Ophiuroidea Echinoidea Asteroidea Holothuroidea Shape of arms Tube feet (present or absent; lack or possess suckers Ossicles (well developed, reduced, etc.) Feeding method Location of madreporite Spine structure

Explanation / Answer

Characteristic Crinoidea Ophiuroidea Echinoidea Asteroidea Holothuroidea Shape of the arm Highly branched long, thin arms demarcated from central disc do not have arms thick arms that extend from central disc absent Tube feet tube feet present, suckers absent tube feet present and is pointed, no suckers present, suckers present Present, has suction disc tube feet present, suckers present Ossicles absent present present well developed absent Feeding method filter feed with tube feet Detritus feeders, oppurtunistic scavengers herbivores using tube feet and eversion of stomach onto the prey detrivores Location of Madreporite absent oral surface Aboral surface Aboral surface interior Spine structure absent present pentameric present, globular disk-like present, pentameric absent

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