Using the following data, calculate the population growth rate for Brazil:
CBR = 2.6%, Immigration = 2%,
CDR = 2.3%, Emigration = 2%
(Portions of the numeric data are factual.)
HINT: (CBR + Immigration) - (CDR + Emigration) = Population Growth Rate
A. 0.306%
B. 3.06%
C. 0.3%
D. 0.0306%

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.