Fill in the blanks with the available words: All organisms (with its unique elemental composition), and all are related to one another. Species might defer more than others, though. We might also predict that the more similar the percentages of elements are in two species, the closely related those two species are.

WORDS

•evolved on earth

•less

•more

•living under unusual conditions

•trace

•genetically

•naturally occurring

•essential

•evolved on earth