Question 1
Gram-negative nitrogen-fixing bacteria found in association with plant roots are
◦ betaproteobacteria.
◦ cyanobacteria.
◦ gammaproteobacteria.
◦ deeply branching bacteria.
◦ alphaproteobacteria.
Question 2
Members of the genus
Chlamydia are
◦ endospore-formers.
◦ Gram-positive bacteria.
◦ classified with the deeply branching bacteria.
◦ intracellular parasites.
◦ thermophiles.