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CLASSIFYING ANIMALS AS TO THE PRESENCE OF BACKBONE
VERTEBRATES
ANIMALS WITH BACKBONES ARE CALLED VERTEBRATES. FISHES, AMPHIBIANS, REPTILES, AND MAMMALS ALL HAVE BACKBONES AND THEREFORE CLASSIFIED AS VERTEBRATES
INVERTEBRATES
ANIMALS WITHOUT BACKBONES ARE CALLED INVERTEBRATES. WORMS, CLAMS, JELLYFISH, FLIES, AND SPIDERS ARE SOME EXAMPLES OF INVERTEBRATES.
CLASSIFYING THE VERTEBRATES
MAMMAL
• MOST MAMMALS DO NOT LAY EGGS. THEY GAVE BIRTH TO THEIR YOUNG. THEY FEED THEIR YOUNG WITH MILK PRODUCED IN THE MAMMARY GLANDS.
• EXAMPLES ARE DOGS, CATS, COWS, GOATS, PIGS, ELEPHANTS
DUCK BILLED PLATYPUS MAMMAL THAT LAYS EGG
BIRDS BIRDS ARE COVERED WITH FEATHERS. THEY LAY EGGS THAT HAVE FIRM SHELLS. ALL BIRDS HAVE ONE PAIR OF FEET AND ONE PAIR OF WINGS.
EXAMPLES ARE HENS, EAGLE, HAWK, VULTURE, OSTRICH AND KIWI
REPTILES
REPTILES HAVE BODIES THAT ARE COVERED WITH SCALES OR PLATES. THEY LAYTHEIR EGGS ON LAND. THEY CAN LIVE ON
LAND AND ON WATER, CROCODILE AND TURTLES ARE EXAMPLES OF REPTILES.
AMPHIBIANSAMPHIBIANS SUCH AS FROGS AND SALAMANDERS LIVE A DOUBLE LIFE.
THEY LIVE PART OF THEIR LIVES WHILE THEY ARE YOUNG IN WATER. WHEN THEY MATURE, THEY LIVE ON LAND TO SURVIVE. ALL AMPHIBIANS LAY EGGS ON WATER.
FISHMOST FISH ARE COVERED WITH SCALES. SOME ARE EGG LAYERS; OTHERS ARE LIVE BEARES. THEY SPEND ALL OF THEIR LIVES IN WATER. FISH HAVE GILLS WHICH ARE USED FOR BREATHING.
CLASSIFYING INVERTEBRATES
PHYLUM COMMON NAME
DISTINGUISHING CHARACTERISTICS
PORIFERA SPONGES PORE-BEARING ANIMALS
PHYLUM COMMON NAME
DISTINGUISHING CHARACTERISTICS
CNIDARIA HYDRAS HOLLOWINTESTINED
ANIMALS
PHYLUM COMMON NAME
DISTINGUISHING CHARACTERISTIC
S
PLATYHELMINTHES FLATWORMSFLATTENEDELONGATEDWORMLIKEANIMALS
PHYLUM COMMON NAME DISTINGUISHING CHARACTERISTICS
ANNELIDS EARTHWORMSLEECHES
ELONGATEDWORMLIKE
ANIMALS WITH EXTERNALLY
EVIDENT SEGMENTATION
PHYLUM COMMON NAME DISTINGUISHING CHARACTERISTICS
MOLLUSK SNAILS, CLAMSSQUIDS
SOFT BODIED ANIMALS USUALLY LIVING IN A SHELL OR EXOSKELETONS
PHYLUM COMMON NAME DISTINGUISHING CHARACTERISTICS
NEMATODES ROUNDWORMS
ELONGATED, UNSEGMENTED,
WORMLIKE ANIMALS.
THREADLIKE ANIMALS
PHYLUM COMMON NAME
DISTINGUISHING CHARACTERISTICS
ANTROPHODS
INSECTSCRABS
SPIDERSCENTIPEDES
SEGMENTED ANIMALS WITH
HARDENED OUTER SKELETON AND
JOINTED APPENDAGES
PHYLUM COMMON NAME
DISTINGUISHING CHARACTERISTICS
ECHINODERMSSTARFISH
SEA URCHIN
SPINY-SKINNEDANIMALS