If a student’s data did not support her hypothesis she should "<span>change the hypothesis" (after confirming that there weren't other variables that could have affected the result). It's important to be open minded when experimenting and not be too invested in your hypothesis when it proves to be wrong. </span>
Answer:
Option A, accumulate sulfur as intracellular granules.
Explanation:
Purple sulfur bacteria belong to the group of Proteobacteria. These probacterias are anaerobic in nature and yet are able to photosynthesise. They are usually found in water environments such as hot springs, stagnant water etc. They use sulphur (either in the form of sulfide, or thiosulfate) as an electron donor in their photosynthetic activity to oxidise sulfur thereby producing granules of elemental sulfur.
while filamentous sulfur oxidizers use nitrate instead of oxygen to oxidize sulfide thereby producing granules.
Hence, option A is correct.
Periodontist is the term you're looking for
