Evolution Of Australia Biotia Flashcards Preview

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Flashcards in Evolution Of Australia Biotia Deck (7)
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1

Smaller continental plates in Gondwana

Antartica
India
Australia
Africa
South America
Madagascar

2

Evidence that Australia was once part of a landmass called Gondwana

Matching continental plate boundaries- shows that southern continents match up like a jigsaw to form a large landmass

Sea floor spreading- provides a mechanism that caused Gondwana to break up and the smaller plates to drift

Fossils- been found on seperate continents that were once part of the Gondwana landscape
Eg glossopteris
Gangamopteria.
Both rainforest trees

Current day organisms with similar characteristics found on Gondwanan continents- marsupials southern beech tree and flightless birds

3

Extinct species

No longer existing

4

How evolution of most living organisms can be traced to common ancestors

Fossil record
Distribution

5

Extant species

Still existing

6

Most Megafauna have become extinct
due to

Climate change- Australia now warmer and drier
Human expansion- hunting

7

Australia's past has been recorded form recent fossil find examples

Riversleigh (QLD) --place
Thingoelontans --- fossil

Bluff downs (QLD) - place
Bluff downs giant Python--- fossil