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earnstyle [38]
3 years ago
11

What is the most efficient way to extract oxygen from the environment?

Biology
1 answer:
Karo-lina-s [1.5K]3 years ago
3 0

Answer:

a. Countercurrent

Explanation:

Countercurrent has been adapted from fish gills where the air is drawn from the blood flowing in the opposite direction to the water flowing to the gills.

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