Revision Evolution MC Answer 8
Stramatolites, and acinent cyanobacteria that have surivited inte Shark Bay in Western Australia, are very similar to those found as fossil remains dateing back millions of years. Why have thes ancient forms remained unchanged for so long?
a)The stromatolites are able to adapt to any environment
This untrue as any environment would mean air and land, also to survive they have to outcompete other organisms that have access to the same resources.
b)The environment has not changed significantly over time.
This is the best answer, it means that if the enviroment has not changed, the organism has not had to change
c) the stromatolites have not been able to undergo mutations
Mutations and sex drives variation. This organism may have created many new species, just the one most similar to the ancient one is living in the similar organism
d) the stramatolites are not able to adapt to a changing environment
This is would explain why they are not wide spread, but it does not explain why they have survived for millions (billions of years)
This video suggests that they are in all environments as something else, and when the enviroment is right they get going.
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- I come from a Science family: My father Geoffrey Hill was Australia's first computer programmer on CSIRAC the fourth computer in the world. He is credited with invention of Computer music and the development of “Interprogram” a language before Basic. My PhD is in Atomic and Molecular Physics. I have researched the activated oxygen layer above the ozone layer, and 'Assigned' the world's smallest molecule. At the University of Toronto I researched high power UV lasers. I have specialized in automation in fibre optics. This developed into research in Machine Intellect and Robots. I have enjoyed work as an Explainer with Questacon and my time as a part-time soldier. I currently teach High School Science at Epping Boys’ High.