A cell has a surface area of 32 um and a volume
of 8 um. A different cell has a surface area of
36 um and a volume of 12 um. What is the ratio
of surface area to volume for the cell that is
predicted to exchange materials with the
surrounding environment at a faster rate by
diffusion? Enter your answer as a fraction or a
whole number.

Which statement correctly describes other ways in which nebulae and stars are different? a. a star always has a higher density than a nebula. b. stars can form inside a nebula but a nebula can never be produced by any star. c. stars can never form inside a nebula but a nebula can be produced by any star. d. a nebula always has a higher density than a star. reset submit