3 Written questions
3 Multiple choice questions
- the assimilation of atmospheric nitrogen by soil bacteria and its release for plant use on the death of the bacteria
- an organism that cannot grow in the presence of oxygen
- the act of making or becoming a single unit, In bacteria, the direct transfer of DNA between two cells that are temporarily joined.
2 True/False questions
toxin → a poisonous substance produced during the metabolism and growth of certain microorganisms and some higher plant and animal species
obligate aerobe → an organism that cannot grow in the presence of oxygen