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Across 1. Spiders, ticks, mites, and scorpions 3. covered with feathers and lay fertile 5. the broadest level of classification. 6. an external hard body covering 7. based on internal and external body structures 9. have a two-part shell 12. have dry skin covered with scales 13. small, soft-bodied animals without an internal skeleton 14. animals that do not have a backbone 15. have an exoskeleton and six legs 16. a combination of its genus and species. (2 Words) 18. have single-part shells 19. animals that live in the water and on land

Down 2. a worldwide system that uses seven stages or levels (2 Words) 4. animals have a singlecompartment 8. have soft bodies, no legs, and no antennae 10. animals with a backbone 11. animals that are covered with fur or hair, females produce milk 12. animals have a four-compartment 17. have an exterior covering of scales or skin and adjust their body temperature to the