Locust trees are tall trees that first grew on earth during the time of the dinosaurs. they have an adaptation that prevented the dinosaurs from eating them. what is an adaptation to save the locust tree? a) deep roots b) large leaves c) large thorns d) waxy cuticle

According to theories of how life began, how did early organic molecules begin to separate from the outside world? a: specialized enzymes were required b: chains of amino acids created a barrier c: formation of microspheres or vesicles d: rna catalyzed the formation of membranes

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.

In figure 1-2 what is the distance from point b to point c?