The proximal end of the radius illustrates the relationship of form and function. The cup-like surface of the radial head articulates with the rounded shape of the capitulum.
This forms a joint that allows for .

The rotational motion of the forearm

Explanation:

The two large bones of the forearm, one being the Ulna and the other is radial bone or radius.The Radius is larger in size than the Ulna.Radius is prism shaped, little curved longitudinally long bone.The part of two joints known as elbow and wrist comprised the Radius.Radius link with the capitulum of the humerus at the elbow region.Radius forms a joint at the wrist region with the ulna bone.

1. true.2. true.3. true.4. false.5. true.the concept of darwin's theory of evolution involves the idea that there are limited resources in a given living environment and that the organisms which live within have variations in their genetic make up due to random mating. the ones with beneficial genetic variations can express certain traits which give them an upper hand in surviving and reproducing in the said environment compared to ones who may have a more disadvantageous variation in traits. over time, the organisms with an upper hand will survive and reproduce more frequently and pass on their beneficial genes while the others die. the result is evolution, where we observe (usually, but not always) eventually, phenotypic distinct changes.