Choose the correct answer I — task. Science State Board, Class 7.

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1. The following characteristics are essential for classification.

Similarities
Both of them
None of them
Differences

2. Approximately __________ species of living organisms found in the earth.

\(8.6\ million\)
\(8.7\ million\)
\(8.5\ million\)
\(8.8\ million\)

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