echinoderms have ________

• no skin

• spiny skin

Is a sponge an echinoderm?

• yes

• no

Which is not an echinoderm?

• sea urchin

• octopus

• brittle star

• sand dollar

Which is an echinoderm?

• sea cucumber

• whale

• jellyfish

Echinoderms breathe using _____.

• mouth

• lungs

• gills

• gills and mouth

What echinoderm is this?

• sea lily 
• sea urchin 
• sea cucumber 
• sand dollar 

What echinoderm is this? 

• sand dollar
• sea urchin 
• sea star
• brittle star