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Multiple Choice
In the context of organic chemistry, what type of organism do the oldest known fossils belong to?
A
Plants
B
Animals
C
Fungi
D
Bacteria
Verified step by step guidance
1
Understand the context of the question: It is asking about the oldest known fossils in the context of organic chemistry, which involves the study of carbon-containing compounds and their role in living organisms.
Recognize that the question is about identifying the type of organism that the oldest known fossils belong to. This requires knowledge of the history of life on Earth.
Recall that the oldest known fossils are stromatolites, which are layered structures formed by the activity of microorganisms, primarily cyanobacteria.
Identify that cyanobacteria are a type of bacteria, which are prokaryotic microorganisms. They are among the earliest forms of life on Earth.
Conclude that the correct answer is 'Bacteria' because they are the organisms that form the oldest known fossils, dating back billions of years.