In the study of hemoglobin, which vertebrate is the most closely related to humans? How do you know?

In the study of hemoglobin, which vertebrate is the most closely related to humans? How do you know?

Primates is a vertebrate that is closely related to humans with such feature, this is as a result of evolutionary theory

Explanation:

answer; blank(1); cervical; blank(2); lumbosacral;

answer increasing the intensity, duration,and frequency of exercise progressively;