1. What Are Vertebrates And Invertebrates?

2. an animal with a backbone
vertebrate
an animal with a backbone

3. Amphibians begin life in water, but when they are adults, they live on land.

4. Birds (Aves) have feathers that keep them warm and help most of them fly.

5. Fish (Ichthyes) have scales and live their entire lives in water.

6. Mammals have hair and produce milk for their young.

7. Reptiles have scaly skin, and most lay eggs on land.

8. Vertebrates are the animals most familiar to us, but they are actually the smallest part of the animal kingdom.

9. 97% of animal species are invertebrates!

10. an animal without a backbone
invertebrate
an animal without a backbone

11. Porifera: sponges, jellyfish, anemones, and corals.

12. Annelids: earthworms, roundworms, and flatworms.

13. Mollusks: octopus, squid, snails, clams, oysters and cuttlefish.

14. Echinoderms: starfish, sand dollars, and sea urchins.

15. have jointed legs and exoskeletons
arthropods
have jointed legs and exoskeletons

16. Crustaceans: crab, lobster, and shrimp.

17. Insects: beetles, mosquitoes, butterflies, and bees.

18. Arthropods are the largest phylum of invertebrates, and insects are the largest class of arthropods.

19. Arachnids: spiders, scorpions, and ticks.

20. Scientists use two criteria when classifying living things:
Structure
Function