The bacteria species known as escherichia coli is capable of using oxygen to produce energy in a process known as respiration. it can also produce energy if no oxygen is available by using a process called fermentation. this ability is best described by which of these characteristics of living things?

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