Which one supports the theory? (these questions suck)

[MedPR]

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One modern theory on the origin of life on earth posits that life has extraterrestrial origins. Given that strong, polarized electromagnetic radiation, available almost exclusively in space, has the ability to destroy biological compounds, which of the following pieces of evidence best supports the theory?

A. amino acids exhibit a left-handed bias, whereas normal assembly of amino acids (without exposure to strong, polarized electromagnetic radiation) would furnish a racemic mixture

B. the sugar-phosphate backbone of DNA is stable when exposed to relatively large amounts of electromagnetic radiation

C. some microorganisms are able to withstand extremely cold temperatures at very low atmospheric pressure

D. bacteria are known to form endospores which are highly resistant to harsh environmental conditions

Go!

 

[chiddler]

D?

 

[MedPR]

D?

That was my first guess too. Try again.

 

[SaintJude]

B.

 

[MedPR]

A

Explanation: B, C, and D are all pieces of evidence which would support the theory that life could survive in space, but they do not necessarily imply that life on earth has extraterrestrial origin. Only "A" suggests that a precondition for life on earth would have been travel through space and exposure to polarized light strong enough to destroy organic molecules.

 

[milski]

E. Morphological similarities between humans and alien bodies found in the Roswell crash?

Seriously though, I'd go with A - it's the only that relates in any way to space, the rest of them are about harsh conditions, but there are a lot of those on Earth.

Edit: Well, don't I look silly now, posting it after you posted the answer. 🙂