| A | B |
|---|
| vertebrates | animals with backbones |
| invetebrates | animals without backbones |
| pores | tiny openings on a sponge |
| sponge | belong to the phyla porifera |
| spicules | thin spiny structures that form the skelton of a sponge |
| sexual reproduction | when a new organism is created from an egg and sperm cells |
| asexual reproduction | when a single organism creates a new organism |
| cnidarians | have a hollow central cavity with a mouth |
| nematocysts | stinging structures |
| regeneration | the ability to regrow lost parts |
| tapeworm | an example of a flatworm |
| trichina | an example of a roundworm |
| earthworm | an example of a segmented worm |
| snails and slugs | gastropods or stomach footed mollusks |
| oysters and clams | bi-valves, 2 shelled mollusks |
| octopus and squid | cephalopods or tentacled mollusks |
| jellyfish, hydra,coral | examples of cnidarians |
