Question

click each test tube to test for the presence of lipids. record color changes in the data table. the mystery food sample does not contain lipids because the test tube has a floating red layer remains the same

Explanation:

Sudan Red is a dye that stains lipids. If a sample contains lipids, Sudan Red will bind to them and show a visible color - change or layering related to the lipid presence. In this case, since the test - tube with the mystery food sample remains the same (no new or different color - related layering compared to the known non - lipid sample like water), it indicates the absence of lipids.

Answer:

The mystery food sample does not contain lipids because the test tube remains the same.