How are cells in multicellular organism able to achieve homeostasis

Why aren't the stains like crystal violet and safranin washed away with water during simple staining?

Which of these is not an example of molecular homology? 1. use of dna and rna as genetic material 2.use of glycolysis as the first step in cellular respiration in both plants and animals 3. the lack of an igf-1 gene in prokaryotes 4. the use of aldolase b to break down fructose in bacteria, plants and animals

If garbage is left on the street flies in microbes can arise from nothing to feed on it true or false