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biology 0610printed 10 · PDF 10
328 pagesrevision 46933
printed 10 · PDF 10
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10
Features of Prokaryotes:
Unicellular
Cells have cell walls made of peptidoglycan but no nucleus or mitochondria
Often have plasmids
Within the animal kingdom, several main features differentiate various organisms into
groups - vertebrates and invertebrates
All vertebrates have a backbone and are classified into 5 classes
Class
Characteristic Features
Examples
Mammals
Hair/Fur on skin
Have placenta
Young feed on milk from
mammary glands
Endothermic
Pinna visible
Human, Dog, Elephant,
Lion
Birds
Feathers on skin
2 legs and 2 wings
instead of forelimbs
Lay eggs with hard shells
on land
Have a beak
Endothermic
Scales on leg sometimes
Eagle, Sparrow, Dove
Fish
Loose scales on skin
Lay eggs without shells in
water
Gills to breathe
Salmon, shark, trout
Reptiles
Dry scales on skin
Snake, crocodile, turtle