What is the cell theory considered a scientific theory

Which technically is nasa developing that will astronauts reach mars

The buildup of sediments where a river empties into a slow-moving or nonmoving body of water is known as a/an

Which of the following statements about archaea and bacteria is true? a. neither is single-celled. b. they both have nuclear membranes. c. neither reproduces by binary fission. d. they both lack a nuclear membrane.