How does a convex mirror form an image

To sciences do not agree on which type of grocery bag is better for the environment what is most likely to come out come out of the disagreement

What is any method of measuring the age of an object or event in years, such as using atomic half-life?

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.