The number and location of bones of many fossil vertebrates are similar to those in living vertebrates. this is evidence in support of which of the following concepts?

The concept that this evidence supports is the concept of common descent, meaning that over time the location and number of the bones hasn't changed.

The infrared (ir) and the ultraviolet(uv) represent the two extremities of the visible spectrum (400-700nm). while ir represents electromagnetic radiation with wavelengths longer than those of visible light, uv represents wavelengths shorter than visible light