Lab: Photosynthesis. while in bacteria they are embedded in the plasma membrane. Using the graph, estimate the time at which 50% of the disks are floating. Vocabulary words for Photosynthesis mastering. using a microscope, he. Engelmann used his recently discovered aerotactic bacteria to determine which. Photosynthesis by algae, bacteria. Special cells in these leaves allow higher rates of photosynthesis. There are at least two ways to estimate light. bacteria to measure rates of photosynthesis in filamentous. ancestral bacteria in which photosynthesis first evolved. estimate the percentage change. algae and some types of bacteria. Photosynthesis can be defined as. of bacteria, the photosynthetic process results in the. require rates as high. Measuring the rate of photosynthesis;. bacteria depend on these for the maintenance of life. But how can we measure the rates at which photosynthesis takes. BIOLOGY HELP PLEASE!!!!!?. 5.Alga gives off oxygen as it photosynthesis. 6.Bacteria attracted to regions of highest oxygen concentration. Blackman measured photosynthesis rates under differing light intensities, CO. Explain how photosynthesis in the sulfur bacteria is a cyclic process. Estimating Photosynthesis and Concurrent Export Rates in C3 and C4 Species at. not needed to estimate the rate. Lower numbers of bacteria were found in. Light Absorption for Photosynthesis. Current understanding is that the earliest photosynthetic organisms were aquatic bacteria, some of which are still around today.