Answer:

I speculate (synonym of infer) that as we move down or up the taxonomic system, similarities between organisms either are more obvious or not.

For example, the wolf (Canis lupus) and the dog (a subspecies, Canis lupus familiaris) are similar in appearance or physical characteristics. Whereas from the domain to order, the appearance varies.

Another Answer:

Moving from the point of origin, the groups become more specific, until one branch ends as a single species.  

Sana Makatulong...