Acells membrane is composed of two layers of lipid molecules what is the function of a cell membrane

Select the correct answer. which statement applies only to the axial skeleton, not the appendicular skeleton? a. it contains a pivot joint. b. it has muscles attached that work in pairs. c. it contains red bone marrow. d. it possesses fossa for bone articulation. e. it protects the heart and lungs.

In the united states there are many types of rabbits. four different species have four different ranges or habitats. in which range would developing white fur in winter most likely not be an advantage?

How does the structure of fats enable them to hold so much energy?