本题目来源于试卷: HL Topic A2.1 Origin of cells，类别为 IB生物学
[问答题]
7. Explain why the conditions o+jlvx1l ) y-s6hel n3vl:)hfmn Earth todawc y8oxz xy+jd .(qgn4p-sm.b /3g(ng9 so b/iy make the spontaneous formation of organic carbon c(i/sbz+nn.dbj qcyow.-pxg8 x4 gy /ogms9(3ompounds less likely compared to the conditions on Earth at the time of the origin of life.
参考答案: The present-day atmosphere has a lot more oxygen/ozone.
Oxygen can oxidise organic molecules, e.g. amino acids.
There is less UV light passing through the atmosphere today because there is more ozone.
UV light can provide energy for the formation of organic molecules on the Earth’s surface.
There is a much lower concentration of methane in the present-day atmosphere.
Methane molecules ($CH_4$) could be a raw material for formation of organic compounds. Note: Answers could state these points in reverse, refering to the properties of the
atmosphese at the time of the origin of life. Four of these points are needed for 4 marks.
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