Biology
NULL
Medium
Question
The respiratory surface of unicellular organisms is__________?
A
Specific organ
B
Cell membrane
✓ Official correct answer
C
Cell wall
D
Nuclear membrane
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A
Specific organ
No member explanations yet for this option.
B
Cell membrane
No member explanations yet for this option.
C
Cell wall
No member explanations yet for this option.
D
Nuclear membrane
No member explanations yet for this option.
Explanation
In unicellular organisms, gas exchange occurs directly across the cell membrane, which serves as the respiratory surface.