What is the function or macromolecule subunit below?

Sara goes on a slingshot ride in an amusement park. she is strapped into a spherical ball that has a radius 3*10^2 of centimeters. what is the volume of air in the spherical ball? use this formula: volume of a sphere=4/3pi,r^3 , where r is the sphere’s radius.

In general, characteristics that an organism survive and reproduce become more common over time. what mechanism of evolution causes this?

Describe the function of the endomembrane system? what organelles are involved?