Apopulation of ground squirrels has an annual per capita birth rate of 0.06 and an annual per capitadeath rate of 0.02. calculate an estimate of the number of individuals added to (or lost from) a population of 1,000 individuals in one year. a) 120 individuals addedb) 40 individuals addedc) 20 individuals added d) 400 individuals added e) 20 individuals lost

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.