Why does your body need both movable and immovable joints

Nasa scientists must work together to make sure that everything is correct and accounted for when launching a shuttle. besides a physicist, what other type of scientist would be in making sure that the shuttle has the appropriate type and amount of fuel to reach its destination?

What happens when the cell copies its chromosomes

Plants consume most of their carbon from a. the soil b. the water c. the roots d. the air