Which of the following is a scientific question?

Which technically is nasa developing that will astronauts reach mars

In addition to seeds, which of the following characteristics are unique to the seed-producing plants? a) sporopollenin b) lignin present in cell walls c) pollen d) use of air currents as a dispersal agent e) megaphylls

During endocytosis, cells expel what they don't need take in what they need shrink due to loss of water