Question

Nancy and Esteban are working on a model of an ellipsoidal joint. Which two pieces should they select for their model?

i and ii
iii and iv
i and iii
ii and iv

Answer 1

I believe the answer is i and iii if that helps :)

Answer 2

i and iii

Step-by-step explanation:

The ellipsoidal joints are those that have one concave end in contact with another convex, limiting movement. Because of this format, we can say that the best models for Nancy and Esteban to use are the "i" and "iii" models.

Importantly, these joints allow for flexion, extension, abduction, and adduction, but not rotation.