The gravitational force is the weakest of the four fundamental forces. does that mean that the gravitational force does not have an important role in the universe?

No,that does not mean  that the gravitational force does not have an important role in the universe.

Explanation:

Any two bodies attract each other by virtue of their masses. this force of attraction is termed as gravitational force.The gravitational force is the weakest of fundamental forces but it is of immense importance in the universe.The gravitational force is the reason due to which any two particles in the universe remain together.The gravitational force holds the dust particles and Gases together to form stars.The gravitational force allows the planets to remain in their respective orbits and revolve around their respective stars.This is the reason why Earth could Maintain a safe distance from the sun to make life possible on it.Gravitational force of Earth keeps its atmosphere down to it.If gravitational force did not exist , then no stable system in universe would have existed and no life would have been possible on planet like Earth.

Centriole.centrioles are present in animal cells but are usually absent in plant cells.