1. The simplest animal Invertebrates No symmetry Live in water all over the world Depend on water for food, oxygen, and reproduction

3. Pore - small openings that let water and food inside Collar cell- cells with whips that move water into the sponge and trap food Spike - supports and protects the sponge Jelly-like cell - digests food, removes waste, and forms sperm & egg cell s Larva - Immature form of animal that looks very different from adult

4. Asexual reproduction- organism produces a new organism identical to itself. Ex) Sponges can reproduce through budding where a small new sponge grows on the side of adult and then breaks off & grows Asexual reproduction- organism produces a new organism identical to itself. Ex) Sponges can reproduce through budding where a small new sponge grows on the side of adult and then breaks off & grows Sexual reproduction- organism produces a new organism when sperm and egg combine They can reproduce asexually & sexually!

5. #1 Adult sponge releases sperm #1 Adult sponge releases sperm #2 Sperm enters another sponge and fertilizes an egg #2 Sperm enters another sponge and fertilizes an egg #3 A larva develops #3 A larva develops #4 Water currents carry it away #4 Water currents carry it away #5 Larva settles on a hard surface & develops into adult #5 Larva settles on a hard surface & develops into adult