![The ultimate source of energy that sustains living systems is](https://www.gkseries.com/blog/wp-content/uploads/2022/01/The-ultimate-source-of-energy-that-sustains-living-systems-is.png)
Q. The ultimate source of energy that sustains living systems is
A. glucose
B. oxygen
C. sunlight
D. carbon dioxide
Answer: sunlight
A. glucose
B. oxygen
C. sunlight
D. carbon dioxide
Answer: sunlight
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