A flask containing photosynthetic green algae and a control flask containing water with no algae are both placed under a bank of lights that is set to cycle between 12 hours of light and 12 hours of dark. The dissolved oxygen concentrations in both flasks are monitored. Predict what the relative dissolved oxygen concentrations will be in the flask with algae compared to the control flask. The dissolved oxygen in the flask with algae will .

Explanation:

Photosynthesis is such a type of process that takes place in those types of organisms in which green pigments are present. During this reaction or process, carbon dioxide and water react in the presence of sunlight and form glucose, ATP and water, and an oxygen molecule.  

Since algae have green pigments like chlorophyll and some other so, the process of photosynthesis occurs in these organisms and thus oxygen level increases. Those flasks in which algae are absent so do not show photosynthesis process and thus oxygen molecule is not evolved.

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