Question: The primary problem with the hypothesis that life on Earth originated on Mars is that (a) Mars has never had water. (b) the proposed Martian

The primary problem with the hypothesis that life on Earth originated on Mars is that

(a) Mars has never had water.

(b) the proposed Martian fossils are much smaller than the tiniest bacteria on Earth.

(c) life on Mars would have had no way to get to Earth.

(d) life has never been found on Mars.

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