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.
Bivalve molluscs are so-called because their shell is divided into two articulated valves (compare them to gastropods and cephalopods, which are also molluscs). In large bivalves, such as scallops and large clams, the valves are corrugated to give them extra mechanical strength. Most bivalves are not capable of active swimming and most are burrowing animals, using their muscular foot to excavate a burrow in soft sediments (some bore into corals and similar hard materials).