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:Which of the following vertebrates incubate their eggs?JSS3 Business Studies Lesson Note on Setting Simple…The blood circulatory system of vertebrates consists of?Which of the following vertebrates has the most…JSS3 First Term Business Studies Lesson Note –…SEE ALSO What is the function of contractile vacuole in paramecium?