**urgent **
one challenge of tissue engineering is to ensure that the cells grow into the correct shape. to facilitate the growing of the cells, engineers use what?

a. biocompatible materials
b. nanotubes
c. the engineering process
d. scaffolds

Choose all that apply. when creating a graph, you should: determine the x- and y- variables label the scale on the x- and y- axes plot the data points draw a line of best fit to represent the data trend

Maria wants to determine which type of disinfectant kills the most bacteria. which of the following is the best way for maria to determine this? a. ask ten different companies that make disinfectants which type is best. b. put the same amount and species of bacteria on ten identical plates, and add ten different kinds of disinfectant to each plate. c. interview ten different people to determine which type of disinfectant they prefer. d. put the same amount and species of bacteria on ten identical plates, and add a different disinfectant to each plate.

The identities of substances are the same before and after which type of change