2007-09-24 02:07:43 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Biology
a. they have spiny covering. (if not, it's rough...)
b. most of them have the ability to regrow missing parts of their body... (not sure...)
c. they don't have backbones... their invertebrates... :)
2007-09-24 02:11:51 · answer #1 · answered by miguel_yorro 2 · 0⤊ 0⤋
1. Radial symmetry
2. Exoskeleton
3. Invertebrate
2007-09-24 09:13:08 · answer #2 · answered by Lady Geologist 7 · 0⤊ 0⤋
echinoderms...
1) Adults typically have radial symmetry (pentaradial) while
the larvae have bilateral symmetry.
2) They have a water vascular system.
3)They have a decentralized nervous system.
2007-09-24 09:13:11 · answer #3 · answered by chikkaaaa 1 · 0⤊ 0⤋
1. Radial Symmetry
2. Rough skin
3. water vascular system
2007-09-24 11:38:44 · answer #4 · answered by St. Judy's comet 3 · 0⤊ 0⤋
They have soft, fleshy skin protected by spines.
They are generally aquatic habitatual creatures.
They have tube-in-a-tube digestive tracts.
2007-09-24 09:13:57 · answer #5 · answered by Anthony K 2 · 0⤊ 0⤋