Why is a cell membrane important to both plant and animal cells? It stores food and water.

It controls the activities of the cell.

It uses energy from the Sun to perform photosynthesis.

It provides a barrier between the cell and its environment.

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