Question on: JAMB Biology - 2017
The most efficient respiratory structure used by free living protozoan is ________
A
body surface
B
gills
C
buccal cavity
D
spiracle
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Correct Option: A
Protozoa do not have any organellae for the process of respiration. The limiting permeable membrane (body surface) acts as a respiratory surface.
The free molecular oxy¬gen from the surrounding media enters into the body by diffusion. Presence of a cyto¬chrome system has been demonstrated in protozoa.
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