UNIT 2. VERTEBRATES.

UNIT 2. VERTEBRATES.

FIRST ANIMALS DESCEND FROM THE EVOLUTION OF AQUATIC ANIMALS.

CLASSIFICATION OF ANIMALS:

CARNIVORES: eat other animals.

HERBIVORES: eat only plants.

OMNIVORES: eat both animals and plants.

1. ANIMAL EVOLUTION.

2. FISH.

WHAT DO FISH LOOK LIKE?

CHARACTERISTICS:

SOME HAVE TEETH.

COVERED IN SCALES.

HAVE FINS ADN TAIL TO MOVE.

HAVE GILLS TO BREATHE.

HOW DO FISH LIVE?

OVIPAROUS: lay eggs.

CAN BE:

CARNIVORES: shark.

OMNIVORES: goldfish.

HERBIVORES: salmon.

3. AMPHIBIANS

WHAT DO AMPHIBIANS LOOK LIKE?

CHARACTERISTICS:

HAVE 4 LIMBS.

HAVE MOIST SKIN.

SOME HAVE A TAIL.

HAVE LONG AND STICKY TONGUE.

HOW DO AMPHIBIANS LIVE?

NEARLY ALL ARE CARNIVORES.

OVIPAROUS: lay eggs.

BREATHING:

YOUNG: GILLS.

ADULTS: LUNGS AND THROUGH SKIN.

5. ADULT FROG.

2. TADPOLE.

3. TADPOLE WITH LEGS.

4. FROGLET (young frog).

1. EGGS.

THE LIFE CYCLE OF A FROG.

4. REPTILES.

WHAT DO REPTILES LOOK LIKE?

SOME HAVE 4 LIMBS AND SOME HAVE NO LEGS.

COVERED BY DRY SCALES.

SOME HAVE A SHELL.

HOW DO REPTILES LIVE?

CARNIVORES AND...

BREATHE THROUGH...

5. BIRDS.

WHAT DO LOOK LIKE?

HAVE A BEAK WITH NO TEETH.

4... .

LEGS COVERED IN SCALES.

BODY COVERED IN...

BREATH THROUGH...

HOW... ?

CARNIVORES,... , OR .

(THEY LAY EGGS).

6. .

WHAT DO LOOK LIKE?

HOW... ?

HAVE FOUR... .

MOST MAMMALS HAVE A... .

HAVE TEETH AND... .

SKIN COVERED IN HAIR OR.. .

FEMALE MAMMALS PRODUCE... THROUGH MAMMARY... .

CARNIVORES,... , OR .

BREATH THROUGH...

NEARLY ALL ARE... (GROW INSIDE THEIR MOTHERS WOMB BEFORE THEY ARE BORN)

THE MOST OF THEM ARE TERRESTRIAL. THE BAT FLIES AND DOLPHINS AND WHALES SWIM.