Is a ramp a form
a an assisting device
b a structural support
c a prosthetic device
d a suspension system

So i have a lot of answers answered but it says i still need to answer more questions. why is it doing that? how many questions need to be answered?

Viruses ) manufacture their own atp, proteins, and nucleic acidsb) use the host cell to copy themselves and make viral proteinsc) use the host cell to copy themselves and then viruses synthesize their own proteinsd) metabolize food and produce their own atp

The famous scientist galileo galilei did several experiments with sloping planes, which he rolled metal balls down so that he could study motion. by changing the slope, he could study how the speed at which the ball rolled was affected. what was the dependent variable in galileo's experiment?