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Problem : In what ways do prokaryotic and eukaryotic flagella differ?

Prokaryotic flagella are anchored in the cell membrane so that they can spin freely. They are made up of subunits of flagellin. Eukaryotic flagella are covered by the cell membrane and are restricted to side-to-side motion. The internal structure of eukaryotic flagella consist of a strict pattern of microtubules made up of subunits of tubulin.

Problem : How do facultative and obligate anaerobes differ?

Both do not require oxygen for respiration. Facultative anaerobes are not bothered by the presence of oxygen, and some have a separate respiratory pathway for using oxygen when it is present. Obligate anaerobes, however, are poisoned by oxygen.

Problem : How have cyanobacteria been misclassified in the past?

Cyanobacteria have previously been classified as algae. While they do have the same type of chlorophyll found in algae, chlorophyll a, they lack membrane-bound chloroplasts or other organelles, and thus are prokaryotes.
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