Looking under a microscope, you note that the cell is a prokaryote. how do you know? it lacks the cell membrane
it lacks nucleus
it lacks genetic material
it lacks cytoplasm

It lacks nucleus.

Explanation:

Prokaryotic: cells that lack a true nucleus or membrane bound organelles.

Pro- before Karyo- Nucleus

It allows water to resist freezing and thawing cycle.

1) clean up you lab area2) dispose of the chemicals as instructed by your teacher3) put everything back where it belongs unless your teacher tells you otherwise4) dispose of gloves5) wash hands with soap and water