Succession performs a variety of functions within ecosystems. what is the main reason that succession is important in maintaining ecosystems?

During binary fission, what events must occur before the cell splits into two new cells?

The cretaceous period spanned the time interval between and 65 million years ago. 250 million 144 million 75 million 200 million

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.