What are immortal cell lines and why are they important for cell research?

When coal has reached it hardest, darkest form, it is called select one: 0 a. sub-bituminous b. lignite c. bituminous d. antrhacite next page

The structure that houses the cells genetic information.

The pie chart tracks the percentage of renewable energy that's being used in a particular community near the ocean. what are two advantages of using this type of graph for this particular data set?