60-70 million years ago

70-80 million years ago

50-60 million years ago

45 - 50 million years ago

Plantae

Protista

Mammalia 

Animalia

Musca domestica (housefly)

Sea otter

Fynbos

Acacia tree

Mitochondria

Ribosomes

Plasma membrane

Cell wall

kingdoms, phyla, classes, orders, families, genera, species

phyla, classes, kingdoms, orders, families, species, genera

classes, orders, phyla, families, genera, kingdoms, species

kingdoms, phyla, classes, orders, species, genera, families

Cell walls made of cellulose

Autotrophic nutrition

Multicellular organization

No true nucleus

They must cover only general differences between organisms.

They must be related to the habitat of the organisms.

They must be mutually exclusive.

They must provide overlapping options.

Species found in zoos

Species that migrate regularly

Species found only in a particular region and nowhere else

Species that are extinct