The fact that no one knows how life began on earth is one of the primary unsolved questions of biology since life began on earth 4billion years ago. Test how well you understood the topic in AP class on history and origin of life on earth by taking this challenging but short quiz.
Water vapor (H2O)
Carbon dioxide (CO2)
Hydrogen (H2)
Oxygen (O2)
Nitrogen (N2)
Stanley Miller.
Graham Cairns-Smith.
Thomas Cech.
Aleksander Oparin.
Sidney Fox.
It is supported by the discovery that RNA can act as a catalyst.
It is supported by the fact that some viruses have RNA as their genetic material.
It suggests that there was an "RNA world" about 4 billion years ago.
It says that first RNA, then DNA, then proteins would have been necessary to interact in the chemical evolution that would have led to the development of the first cells.
Autotroph
Heterotroph
Protocell
Microsphere
Proteinoid
Protein-first hypothesis.
RNA-first hypothesis.
Clay-catalyst hypothesis.
1.5
2.8
3.8
4.8
1.5
2.5
3.5
4.5
True
False
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