The Russian chemist Oparin suggested that for organic molecules to form on Earth,the atmosphere was probably rich in all of these EXCEPT
A) oxygen.
B) water.
C) ammonia.
D) methane.
E) hydrogen.
Correct Answer:
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Q3: Which theory explains the origin of chloroplasts
Q6: The early report that Stanley Miller had
Q6: Photosynthesis probably originated during the _ eon
Q10: How did multicellular organisms evolve from unicellular
Q11: The endosymbiont theory states that eukaryotic cells
Q13: Evidence supporting the idea that mitochondria and
Q16: The first cells probably arose about
A)500 million
Q19: Chloroplasts arose by endosymbiosis of _.
A)an aerobic
Q20: The endoplasmic reticulum,Golgi body,and other membranous organelles
Q20: Eukaryotes probably originated about
A)four billion years ago.
B)two
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