Which of these developments is a positive effect of cell technology on society? a. new vaccines can be made quickly enough to stop epidemics. b. the ability to clone animals allows people to replace beloved pets. c. more money is spent to design drugs that treat common diseases. d. cord blood banks are used to store blood to benefit individuals.

A.New vaccines can be made quickly enough to stop epidemics.

Cell technology is a field of biotechnology, in which the totipotency ( self differenciation), self renewable and multi-lineage ability of the cells are used to produce cell cultures which can be further used to treat diseases and disorders in animals, plants and humans.  

New vaccines can be made quickly enough to stop epidemics is the positive effect of the cell technology on society because the cell culture of biological agents like bacteria can be used to prepare the vaccine against the epidemics.  

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.