Which factors affect plant and animal life in terrestrial blomes? A. Salinity
B. Precipitation
C. Dissolved oxygen
D. Season

When analyzing tree rings, what do scientists assume a thin ring indicates?

How do the evolutionary chart and the video support the claim that all living things are made up of cells?

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.