ExamPlay Dark Logo
Pierakstīties

Essential Biochemistry - Environmental Biochemistry (Section 1 - No. 25)

Normal dissolved oxygen (DO) content of water is:
0-2 ppm
20-30 ppm
4-6 ppm
4-4 ppm

Paskaidrojums

A DO content of 4-6 ppm is generally considered healthy for aquatic life.

komentāri (0)

Reklāma