Agnathans in the class Petromyzontida are members of one of our early lineages in vertebral evolution. How does this clade fit into the vertebral evolutionary tree? This group has an interesting life cycle. Provide a detailed description of the general life cycle for this taxon, and make it clear what it means when we say they are anadromous.
- Double spaced, Times New Roman font with a size of 12 (or equivalent font and font size). Margins should be set to normal 1 inch.
- All sources must be cited using APA format, and only primary research articles are accepted sources.
