Which of the following vertebrates has the most simple structured heart By: Sunday|Published on: Mar 22|Categories: Biology JAMB| 0 comments A. reptile B. fish C. mammal D. Amphibian Correct Answer: Option B – fish Users Also Read These:The order of evolutionary advancement to the below…It is well structured with fine particles, tiny and…In the diagram, A unique characteristic that…The blood circulatory system of vertebrates consists of?In which of the following groups of vertebrates is…SEE ALSO Mammals are capable of producing hypertonic urine mainly because of re-absorption in the?