What are the 8 main environmental pressures?

Climate warming trends allow plant and insect species to inhabit larger ranges. select the best answer from the choices provided

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.

The sea slug that considered to be a photosyntheesizing animal