Name: Course: Tutor: Date: Organism Comparison 1. Tissue Organization Distinct tissues absent (answer: sponge) Distinct tissues present (answer: all other animals) 2. Symmetry Radical (answer: earthworm, roundworms and hydra, sponge) Bilateral (answer: all the other animals) 3.
Body Cavity Acoelomate (answer: crayfish, sea fish) Pseudocoelomates (answer: roundworms, clamworm, clam, hydra and lancet) Eucoelomate (answer: pig, grasshopper) 4. Openings to digestive tract One (answer: planarian, lancelet, sea star, hydra, crayfish, clam) Two (pig, grasshopper) 5. Circulatory system None (answer: roundworms, earthworms, planarian , lancelet) Open (answer: grasshopper, sea star, hydra, clam, crayfish) Closed (answer: pig) 6.
Habitat Aquatic (answer: sponge, sea star, planarian, crayfish, hydra, lamncelet ) Terrestrial (answer: pig, grasshopper, earthworms) Parasitic (answer: roundworms) 7. Organs of gas Exchange Skin (answer: Earthworms, roundworms, planarian) Gills (answer: sea star, lancelet, crayfish, clam) Lungs (pig) Spiracles/tracheae (grasshopper, sponge) 8. Organs of Excretion Skin (sea star, planarian, earthworms, and roundworms), kidneys and lungs (pig), pores (sponge), gills (hydra, crayfish, sea star, and clam), and spiracles (grasshoppers). 9.
Type of Locomotion Walking (pig), jumping/hopping (grasshopper), swimming (sea fish, hydra, clam, sponge, lancelet) and crayfish), wiggling (earthworms, planarian, roundworms). 10. Support Systems External (clam) Internal (pig, grasshopper, sponge, sea star, crayfish ) Hydrostatic (planarian, earthworms, roundworms, lancelet, hydra) 11. Segmented body No (Answer: sponge) Yes (all the other animals) 12. Appendages No (Answer: sponge, earthworm, planarian, roundworm, lancelet) Yes (Answer: All the other animals) 13. Nervous System Ventral nerve cord (round worms, earthworms, hydra, planarian) Dorsal nerve cord (pig) Post anal tail (lancelet, crayfish) Others (sponge)