Your undergraduate colleague accidentally mislabels tissue samples taken from different parts of a rat. in order to correct his mistake, you make slides from each sample and stain all tissue red and all nuclei blue. upon analyzing one slide under a compound light microscope, you see many small reddish pink dots but no blue. this slide must be a sample of tissue from the rat's select one: a. lungs b. thymus c. liver d. blood e. striated muscle