1. ________ are unicellular organisms that lack a nucleus

2. A second membrane, called the _____, is found outside the wall in some bacteria.

3. ______ are the most rare of the two different domains of prokaryotes, and are found primarily is harsh conditions.

4. The protective structure that a prokaryote may form when conditions are unfavorable is called an _______

5. Bacterial growth can be slowed or blocked using medications called _______.

6. Bacteria can connect and exchange pieces of DNA, called plasmids, through a process known as ________. ​