Sand dollars a rigid skeleton called a 'test' (which is basically a shell).
Sand dollars do not have brains. They are invertebrates whose bottom surface contains the mouth, black spines and cilia.
The sand dollar has one thick calciferous bone like structure called the test.
No
nope
Yes
Sand dollars has a rigid skeleton known as a "test", but these are not backbones so they are invertebrates. Vertebrates are animals that have spinal chords, heads and backbones. Sand dollars are animals related to sea urchins, in a different group called Echinoids. These have none of spinal chords, heads or backbones, so cannot be vertebrates.
In the sand
You can not cheat to get sand dollars. You have to work for it, or you have to buy it.
Sand dollars.
Sand dollars breathe through a process known as diffusion, using their tube feet.
sand dollars got there name because they are shaped like a coin and they dig themselves into the sand
Sand dollars don't protect themself, they just sit their........ :)-
Phylum Echinodermata
what is the sand dollars kingdom
No, sand dollars mainly eat small worms and algae.
Sand Dollars are about the size of a grown human hand when fully grown. They cannot eat humans.
No