The oldest eukaryotic fossil is: (a) \( 1.5 \) billion years old (b) \( 3.5 \) billion years old...

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The oldest eukaryotic fossil is:
(a) \( 1.5 \) billion years old
(b) \( 3.5 \) billion years old
(c) \( 2.5 \) billion years old
(d) 600 million years old
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