Activity 2

Birds:

-Only group of animals to posses feathers

-Has bills, instead of teeth. Bills are toothless mandibles covered with a horny sheath of keratin

-Egg laying

-Warm blooded

Fish:

-Presence of gills

-Have scales and fins

-Cold blooded

-Egg laying

Mammals

-Have hair/fur

-Jaw Joint

-Mostly give birth to young, some would lay eggs (e.g. platypus)

- Tooth replacement

- 3 middle ear bones

- females produce milk to feed their young

'Reptiles

-Dry skin with scales or scutes

-Spinal columns and a strong skeletal system with a rib cage.

-Cold Blooded

-Vertebrates

-No External Ears

Amphibians

-Breathe with skins and gills

-Moist Smooth Skin

-A three-chambered heart

-Webbed Feet

-Lays many egg

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