if its glitching out, click the green flag again. HOMOLOGOUS STRUCTURES 2: Most sharks have 5 pairs of gills, while the frilled shark has 6, the first with frills highlighting the (albeit modified) gill arch commonly found in vertebrates. On a molecular level, studies discovered that they have genes for yolk proteins (or VTG) and the receptors in frilled sharks are found to be similar to those of vertebrates, though the expression of the uterus is different, showing an interesting pathway to livebearing in frilled sharks NOT FINISHED
