Question

where does the smell of rain come from f...
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which chemical, released by soil bacteria, is part of the petrichor scent and is also found in beets?
methane
geosmin
nitrogen
chlorophyll

Explanation:

Geosmin is a chemical compound that is released by certain soil bacteria (such as Streptomyces). It is a key component of the petrichor scent (the smell of rain on dry soil). Additionally, geosmin can be found in beets, which is why sometimes beets can have an earthy smell. Methane is a gas (\(CH_4\)) and not related to the petrichor scent in the context of this question. Nitrogen (\(N_2\)) is a major component of the air but not the chemical in question here. Chlorophyll is related to photosynthesis in plants (gives plants their green color) and not the chemical from soil bacteria for petrichor.

Answer:

Geosmin