1. true or false flatworms are known as acoelomates.
2. true or false flatworms have bilateral symmetry and cephalization
3. true or false hookworms infect 25% of the world's population
4. true or false annelids have a closed circulatory system with blood vessels.
5. true or false annelids have a macro brain and micro brain
6.true or false leeches are parasitic flatworms that live on blood
7. true or false the most active mollusks are cephalopods
8. true or false gastropods are move by using a foot
9. true or false an octopus moves by jet propulsion by taking water into its mantle and forcing it out.