Sediment laid down by glacial meltwater is called

a glacial erratic
stratified drift
ground moraine
an outwash plain

You need to determine if a pure culture of bacteria is gram-positive or gram-negative, but you've just spilled your only solution of crystal violet so you can't do a gram stain. you decide to try a lysozyme treatment on a sample of each culture and then examine the samples under the microscope. the expected result is