Friday, October 12, 2007

chapter 7 - critical thinking

New Zealand sea daisy

Sea daisies were first discovered in sunken wood off the coast of New Zealand in 1983. They are
tiny animals, about the diameter of a pencil, and live 1 kilometre below the surface of the sea.
Scientists gave them a separate classification as they were unlike any other echinoderms (the
group to which tube-footed animals belong). The upper surface, seen here, is made up of
numerous perforated scales and is fringed with spines. It is assumed they get their food by
absorbing nutrients from decomposing logs of wood, for they have no mouth, guts or anus. Some of the specimens hauled up contained fully developed embryos within their reproductive organs, indicating they give birth to live young.I think they are not classified into a new phylum, because the scientists don't have exact proof to find the same kind animal on the earth. on the
other hand, they have some same characteristics Echinodermata does. For me, i think daisy's
body has different function than other animals do. maybe they don't need any food but without
water to wet their body to be alive or they just absorbing by their spines. For they moving
problem, i think maybe they are the kind of animal do not like to move all the life. If they get
move, that maybe caused by the water force. Of course, everything thing only is a guess.Also,
maybe we will find the same kind of animal like daisy and we will classified them to a new group
someday, who knows!!

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