Can you help me with this

The cretaceous period spanned the time interval between and 65 million years ago. 250 million 144 million 75 million 200 million

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

Physical characteristics of down syndrome