What is catalase and where is it found in living organisms?

You see a white marker with an orange circle and black lettering. what does this marker tell you

Anurse is caring for a client who is learning how to take care of a newly created colostomy. when observing a return demonstration of the colostomy irrigation, the nurse evaluates that more teaching is required when the client carries out what procedure?

If a grape were placed in a hypertonic solution what would happen and why?