42. What is an example of a ball and socket joint? A. Shoulder joint
B. The spine
C. Ankle joint
D. Knee joint

on island x the species needed to adapt because they were being subject to predators which didn't inhabit island y.  

mass and weight are closely related because mass affects the weight of an object experiencing the effects of gravity. weight is the measure of the force of gravity on an objects's mass, while mass is the measure of how much matter there is in an object.

answer; incomplete dominance;