Algae Photosynthesis Lab Report Research Question: How would light intensity affect photosynthesis on marine algae N. Oculata? Null Hypothesis: Light intensity will not affect the rate of photosynthesis in marine algae N. Oculata. #1 Alternative Hypothesis: If light intensity increases then the rate of photosynthesis will increase in marine algae N. Oculata. #2 Alternative Hypothesis: If light intensity increases then the rate of photosynthesis will decrease in marine algae N. Oculata. Independent Variable: Light Intensity Experimental Group: (100 watt bulb) (20 cm, 40 cm, 60 cm) Control Group: There is not control group, because there isn?t a part being tested with no light intensity Dependent Variable: The amount of dissolved oxygen Constants: