Q31 Dynamic instability of microtubules: A)is caused by the large size of this type of cytoskeletal element. B)results from a deficiency of free tubulin subunits. C)allows microtubules to perform their functions. D)is shared by no other cytoskeletal elements. E)All of these choices are correct.

a scenario where a cell may be needed to perform a form of endocytosis is when transporting large molecules. a scenario where a cell may be needed to perform a form of exocytosis is when releasing the large molecule from the cell.

those characteristics are cellular organization, reproduction, metabolism, homeostasis, heredity, response to stimuli, growth and development, and adaptation through evolution. some things, such as a virus, demonstrate only a few of these characteristics and are, therefore, not alive