Sage conducted an experimental investigation of the gas production of a ^ * 1 point water plant. She placed a beaker upside down over a water plant submerged in water and collected the gas that the water plant produced when kept in sunlight. After several days, a large bubble of gas collected in the upside-down beaker. What is the best description of the makeup of the gas in the test tube?
1. The gas contains one of the products of respiration, oxygen.
2. The gas contains one of the products of photosynthesis, oxygen.
3. The gas contains one of the products of respiration, carbon dioxide.
4. The gas contains one of the products of photosynthesis, carbon dioxide.
The best description of the makeup of the gas in the test tube is:
2. The gas contains one of the products of photosynthesis, oxygen.