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- Deuterostome embryo development
- Secondary radial symmetry: larvae have bilateral symmetry (radial symmetry thought to have evolved from sessile forms)
- Five radial parts; sea urchins and cucumbers by folding "arms" upwards and fusing their edges; sea cucumbers lay on "side" and developed pseudo-bilateral symmetry, i.e. have distinct upper and lower side
- Endoskeleton: calcite plates = ossicles, covered by epidermis, may be single plates (flexible body) or fused (solid shell, sea urchin)
- Spines on calcite plates give "spiny skin" (phylum name!) sea urchin spines are endoskeleton and covered by thin skin!
What else can I help you with?
What is a common characteristics between arthopods mollusk cndarian echinoderm?
there invertabrates
What characteristics do echinoderm's have?
Echinoderms are invertebrates with an internal skeleton and a system of fluid-filled tubes called water vascular system.
Can you use the word echinoderm in a sentence?
A starfish is an echinoderm.
Is a spider an echinoderm?
No. A spider is an arachnid. A starfish is an example of an echinoderm.
Does a echinoderm have a back bone?
Echinoderm is an invertebrate and therfore it has no backbone
Is a sand dollar a echinoderm?
Yes sand dollar is an echinoderm.
What is the difference between human spine and a echinoderm?
an echinoderm is an organism with no spine
Is a bird an echinoderm?
A bird is NOT an echinoderm because they dont live in salt water
Why is echinoderm a good name for starfish?
Because echinoderm means "spiny skin."
Are starfish echinoderm?
Yes , a starfish is an echinoderm . It belongs to class Asteroidea . It is marine .
What are two ways you could identify an animal as an echinoderm?
You could identify an animal as an echinoderm by looking for characteristics such as a spiny skin or radial symmetry. Another way is by checking if the animal has a water vascular system, which is unique to echinoderms and helps with movement and feeding.
The nervous system of an echinoderm lacks what?
The nervous system of the echinoderm lacks a cat and a zebra leg, with the fur from a fish, the echinoderm (ee-chee-no-derm) transacts this with its ability to eat rocks, forming a poylp. This makes the echinoderm smart enough to live.
