Test: New SAT Math - No Calculator

1.

Without earthworms, modern land-based ecosystems would look very different. There 1 are no way to predict the exact changes that would exist without earthworms, but it is easy to recognize earthworms’ impact. As research continues into the effect of earthworms, scientists are confident that it will show an even more complex picture of the earthworm’s contribution to the land-based ecosystem.

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