The length of carotenoids also has a role in plant coloration, as the length of the polyene tail determines which wavelengths of light the plant will absorb. Wavelengths that are not absorbed are reflected and are what we see as the color of a plant. Therefore, differing species will contain carotenoids with differing tail lengths allowing them to absorb and reflect different colors.
Rating Newest Oldest. Best Answer: they are all no, molluscs are clams, bivalves, and squid none of which have joints. Echinoderms-sea stars, urchins, and the such also do not have jointed appendages, further their bodies do not have segments.Source(s): zoology class. whiskeytangofoxtrot Â· 9 years ago.ating Newest Oldest. Best Answer: they are all no, molluscs are clams, bivalves, and squid none of which have joints. Echinoderms-sea stars, urchins, and the such also do not have jointed appendages, further their bodies do not have segments.
The cephalopods are the most advanced mollusks and include the octopus, squid, and cuttlefish. Of these, only the octopus is really considered benthic. Other than the cuttlefish, these do not appear to have shells. In fact, both squid and octopi have a beak made of shell material.If you try, you can get a squid to bite you.ince there is a huge variety of benthic habitats, mud, sand, rocks, shallow, deep, there is a huge variety of benthic organisms. What they mostly have in common is that they don't swim, at least not much. Nearly every category of animal is included in the benthos. There are the sponges.