Look at this picture of a trilobite. these animals were once present in the ocean but are now completely extinct. what is a likely cause of trilobite extinction? a. something changed that brought these creatures onto land in a slightly different form. b. something changed to limit and finally abolish their success in this environment. c. they failed to develop vestigial organs that would have them survive. d. they were no longer able to acquire the necessary characteristics for survival in a changing environment.

4. rat liver is able to metabolize glucose by both the glycolytic and the pentose phosphate pathway. which of the following are properties of both the glycolytic and pentose phosphate pathway? a. nad+ is involved b. co2 is liberated c. phosphate esters are intermediates d. glyceraldehyde 3-phosphate is an intermediate e. fructose 6-phosphate is an intermediate4. rat liver is able to metabolize glucose by both the glycolytic and the pentose phosphate pathway. which of the following are properties of both the glycolytic and pentose phosphate pathway? a. nad+ is involved b. co2 is liberated c. phosphate esters are intermediates d. glyceraldehyde 3-phosphate is an intermediate e. fructose 6-phosphate is an intermediate

The dense layer of connective tissue that surrounds an entire skeletal muscle is the

Polar zones are cold and tend to be dry because of a pressure system of cold. low high