Question

there has been an increase in the number of chambers in heart during the evolution of vertebrates give the names of the classes of vertebrates having two three and four chambered heart respectively​

Answer 1

Answer:

Question : There has been an increase in the number of chambers in heart during evolution of vertebrates. ... (b) Three chambered heart develops after the division of auricle into right and left halves as in amphibian. Mising of oxygenated and deoxygenated blood occurs in ventricles.