Answers2026 Summer 305 CR_2002040-MJ Comprehensive Science 1The Circulatory and Respiratory SystemsQuestion 1
1
AssignmentMultiple Select

The Circulatory and Respiratory Systems

Question 1 • 2026 Summer 305 CR_2002040-M/J Comprehensive Science 1

Which substances do cells need to produce energy? Check all that apply.oxygenwatercarbon dioxidesun’s energysugar molecules

Answer
A
oxygen
B
water
C
carbon dioxide
D
sun’s energy
E
sugar molecules
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