The mockingbirds that darwin collected on different islands in the galápagos belong to four subtly different species. this pattern of similar but distinct species on nearby islands is common around the world. why was the pattern important to darwin's thinking about the origin of species?

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explanation:

explanation:

b,bacteria convert nitrates

into nitrogen gas.

d,plants and animals take in

and use nitrogen compounds.

e,bacteria break down waste    

products and return nitrogen  

to the soil.

a,bacteria convert atmospheric

nitrogen to ammonia.

c,bacteria convert ammonia

to nitrites and nitrates.