Similar structures in the anatomy of two different species are called homologies. What homologies are shared by rats and elephants?

Four types of motile cells in human body?

Compare the composition of the moon's surface with the composition of the earth's surface.

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.