Why are immortal cell lines important for biological research?

In what part of the body does the most muscle activity happen?

Which statement best describes a typical difference that could be found between the “analysis” and “conclusion” sections of a lab report?

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