What is the one finding or assumption that could cast doubt on the role of stromatolites in the early evolution of life on Earth?
A) They form in aquatic environments .
B) They are one of the most commonly preserved sedimentary features in Precambrian time.
C) They come in different shapes (sheets and domes) .
D) The interaction between microorganism and minerals and sediments is poorly understood.
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A)photoautotrophs.
B)photoheterotrophs.
C)chemoauthotrophs.
D)chemoheterotrophs.
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