Why do the polar bear and the sun bear have many similar traits? a. they live in similar environments. b. they evolved from a common ancestor. c. they are evolving into two separate species. d. they each have unique adaptations to survive.

answer; i believe that the correct answer is ; males are hemizygous for the x chromosome;

explanation:

the universal gravitation equation. since the gravitational force is directly proportional to the mass of both interacting objects, more massive objects will attract each other with a greater gravitational force. if the mass of one of the objects is doubled, then the force of gravity between them is doubled.