Chad states: "Bears and sharks both have sharp teeth. This means that they are closely related animals, and also best friends"
Chad is mistaken, because he doesn't understand the concept of:
Convergent evolution
Divergent evolution
Adaptive radiation
Natural Selection

Chad is incorrect because these 2 animals are completly different. One if a Marine animal and the other is a Land animal.

Explanation:

convergent evolution

Explanation:

In evolutionary biology, convergent evolution is the process whereby organisms not closely related (not monophyletic), independently evolve similar traits as a result of having to adapt to similar environments or ecological niches.

micro/nanoscale topography surface exhibits many prominent properties and is extensively employed in biomedical device, microfluidic device and energy device fabrication. additionally, the clinical applications of biomaterials can be largely expanded with of nanostructured surfaces.

the answer is c on e2020, bud.