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- 1. Question
The most abundant gas in the atmosphere is __________________
- 2. Question
Main nutrients that are recycled in nature include_________________________________________
- 3. Question
Oxygen makes up about ____________________ of the earth’s atmosphere
- 4. Question
The following processes remove oxygen from the atmosphere except _____________________
- 5. Question
Which of the following animals does not feed on decomposing materials called detritus?