Why is it essential to fix smears on slides before staining? a. to cause swelling of the cell to make interior structures more visible

b. to provide a nutrient medium to sustain the bacteria

c. to attach them to the slide

d. to enhance the uptake of stains

Select the correct answer. which mutation is harmful to the organism? a. a mutation allowing moths to camouflage better on blackened tree bark b. a mutation making staphylococcus aureus resistant to the antibiotic methicillin c. a mutation inhibiting human immunodeficiency virus from attaching to and entering the cell d. a mutation causing uncontrolled cell division e. a mutation giving plant leaves a bitter taste to discourage herbivores from eating them