Which evidence did carl linnaeus use to classify organisms?

physical characteristics

evolutionary history

physical characteristics and evolutionary history

physical characteristics, genetics, and evolutionary history

Physical characteristics

Explanation:

During the time of Carl Linnaeus technology was not as advanced as today and the years that came after him. He mainly based his observations on the physical characteristics. As time passed, scientists were able to broaden his categories and subdivided them even further. He was known to have come up with the binomial nomenclature, using terms that described the organisms similarities.

A.  physical characteristics

Explanation:

answer; i believe the correct answer is ( proteins );

answer; ///(b) it is composed of four protein chains and four heme groups;