Match the following
1. Substances entering the cell
2. Waste products leaving the cell
3. Conditions which allow life to continue
a. Steady temperature; pH between 7.35 and 7.45; electrolyte balance
b. Oxygen; substances for building complex molecules; substances which act as energy sources
c. Ammonia; carbon dioxide
Answers:
[b] 1.
[c] 2.
[a] 3.
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