Question 1
What does the term "deeply branching bacteria" mean?
◦ The bacteria likely branched from other Bacteria very early.
◦ This group of bacteria have ribosomal RNAs very divergent from the rest of the members of the domain Bacteria.
◦ The bacterial cells have a Y or "branched" shape.
◦ The bacteria grow in long filaments with frequent branches.
◦ The bacteria grow in environments far below the surface of the Earth.
Question 2
Aerobic cyanobacteria carry out the reactions of nitrogen fixation in
◦ endospores.
◦ heterocysts.
◦ lamellae.
◦ akinetes.
◦ chloroplasts.