Question 2 of 12 Which statement best explains why the classification schemes of taxonomists have changed over time?
Some groups of organisms have unusual biochemistry.
There are no guidelines as to how organisms may be classified.
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Improved technology increases the amount of information known about organisms.
Newly discovered organisms are always being added to the lowest levels of classification systems.
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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.