Why do you suppose the latency differed between the median and lateral fibers?

Plsss > .< compare and contrast the characteristics of flatworms rounds worms and earthworms

In which of the following relationships is one organism always benefited while the other organism is always harmed

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.