A scan of Sam's genome for the 100 most common mutations known to cause RP didn't find anything. How can you explain this result?

Why do german shepherds shed so much

Explain the source of radioactivity in uranium in earth’s crust by which it produces nuclear radiation

Lactase is essential for digesting lactose in milk. this enzyme is specific for this sugar. why? molecules and active sites vary in size; only properly sized molecules can fit.there is a precise compatibility between the active site and the lactose molecule.specificity refers to the action of the enzyme, such as hydrolysis, and relatively few molecules can be hydrolyzed.reaction-specific enzymes assume a fit by folding around the most numerous substrate molecules.