2. VERTEBRATES
ANIMALS WITH BACKBONES ARE CALLED
VERTEBRATES.
FISHES, AMPHIBIANS, REPTILES, AND
MAMMALS ALL HAVE BACKBONES AND
THEREFORE CLASSIFIED AS VERTEBRATES
5. 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
•
7. 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
8. 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.
9. AMPHIBIANS
AMPHIBIANS 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.
10.
11. FISH
MOST 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.