1.1 organism and their classification

BIODIVERSITY

What is BIODIVERSITY ?

• The wide variety of organisms on earth.

• ‘Bio’ = living things

• ‘Diversity’ = variety

• ‘BIODIVERSITY’ means variety of life

Animals

VertebrateAmphibians

Fish

Birds

Mammals

Reptiles

Invertebrate

CLASSIFICATION OF ANIMALS

AMPHIBIANS

Eg: Toad, Frog, Salamander

AMPHIBIANS

• Cold blooded animals• Can live both on land and in water• Have external fertilisation• Young amphibians live in water

(breath through their gills)• Adult amphibians (breath with lungs

on the land and through skin when in water)

FISH

Eg: Goldfish, Porcupine fish

FISH

• Skins are covered with hard and slimy scales

• Have fins and tails (to swim)• Absorbed dissolved oxygen through

gills• Lay eggs that fertilised outside the

body• Cold blooded animals

BIRDS

Eg: Pigeon, Parrot

BIRDS

• Only animals with feathers• Have beaks and wings (not all can

fly)• Breath with their lungs• Warm blooded animals (body

temperature remains constant)• Internal fertilisation

MAMMALS

Eg: Giraffe, Elephant, Rhinoceros

MAMMALS

• Warm blooded animals

• Body cover with hair and fur

• Internal fertilisation

• Young feeds on milk from mother’s mammary glands

• Breath with their lungs

REPTILES

Eg: Rattlesnake, Cobra, Phyton

REPTILES

• Live on land

• Have hard dry scales (protection)

• Breath with their lungs

• Cold blooded animals

• Internal fertilisation