Biology
Grade-10
Easy
Question
Mountain streams of high gradient have __________________.
- High probability of water depletion
- High probability of oxygen depletion
- Low probability of water depletion
- Low probability of oxygen depletion
Hint:
A high gradient stream has a steep slope and rapid flow of water.
The correct answer is: Low probability of oxygen depletion
- The high gradient indicates a steep slope and rapid flow of water
- The rapid flow of water reduces the level of oxygen depletion
- Fast-moving streams have more oxygen than still water. This is because the rapid movement mixes the air into water. However, if the water is very turbulent stream, oxygen load will be more and causes stress to the aquatic organisms.
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