| A | B |
|---|
| asymmetrical | body plan that cannot be divided into mirror images |
| example of asymmetrical organism | sponges |
| Porifera | all sponges belong to this phylum |
| examples of cnidarians | jelly fish, anemones, corals, hydras |
| radial symmetry | has more than one line that divides the organism into two mirror images |
| bilateral symmetry | organism can be divided into only one plane to produce two mirror images |
| examples of bilateral symmetry | flatworms, roundworms, segmented worms |
| platyhelminthes | are flat worms |
| nematodes | round worms |
| annelids | segmented worms |
| monotremes | is a mammal that lays eggs |
| marsupials | is a pouched mammal |
| placental mammal | its young develops within its mother |
| invertebrates | animals that do not have a backbone |
| example of monotreme | duckbilled platypus |
| example of marsupial | kangaroo, koalas |
| example of placental mammal | dog, cat, horse, tiger, elephant |
| vertebrates | animals with a back bone, endoskeletons and bilateral symmetry |
| jawless fish example | lampreys, hagfish |
| cartilaginous fish example | sharks, skates, rays |
| cartilage | have skeletons made of flexible bone |
| bony fish example | tuna, swordfish, clownfish |
| bony fish | have nerve cord covered by bone, paired fins and swim bladders |
| swimm bladder | allows fish to go up or down in water |
| amphibians | cold blooded animals that spend part of their lives in water and land |
| examples of amphibians | frogs, toads, salamanders |
| reptiles | land animals with thick scaly and waterproof skin |
| examples of reptiles | lizards, snakes, turtles, alligators, crocodriles |
| birds | vertebrates with two wings and two legs with hollow bones |
