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2006-09-10 11:39:05 · 2 answers · asked by Heather S 1 in Education & Reference Higher Education (University +)

2 answers

They both need energy to keep them going?

2006-09-10 13:40:13 · answer #1 · answered by teachr 5 · 0 0

Many different parts working together for one purpose.

2006-09-10 22:39:16 · answer #2 · answered by perdie15 3 · 0 0

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