Examlex
Which of the following mountain chains is the oldest, and hence the most eroded?
Internal Environment
The conditions and processes within an organism that contribute to its functioning.
Stimuli
External or internal agents that provoke a response in living organisms or individual cells.
Cellular Respiration
The series of metabolic processes by which living cells produce energy through the oxidation of organic substances.
Carbon Dioxide
A colorless, odorless gas produced by burning carbon and organic compounds and by respiration. It is naturally present in the air and is absorbed by plants in photosynthesis.
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