The picture below shows a typical chondrichthyan heart, in w…

The picture below shows a typical chondrichthyan heart, in which the 4 subcomponents have been labeled using letters (a – d).  The arrows in the picture refer to the direction of blood flow. Match the letters below with the appropriate subcomponents of the chondrichthyan heart.  

The picture below shows a stable isotope biplot for stable i…

The picture below shows a stable isotope biplot for stable isotopes of carbon and nitrogen in species collected from a South Carolina estuary. The goal of this study was to examine food web structure in this estuary. As you can see, there were several elasmobranchs included in this study. Based on these data, which of the species listed below is the BEST example of a mesopredator?   

As you have learned in class, drag is a force that resists t…

As you have learned in class, drag is a force that resists the forward motion of a body (such as a chondrichthyan’s body) as it moves through a medium (such as water). Which of the following types of drag is produced because the medium “sticks” to the surface of the body in motion?