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BIO 100 Exam 3 2025 Questions and Answers Vertebrate - ....ANSWER ...-Vertebrates have a backbone made of bony vertebrae surrounding the spinal cord, along with mineralized connective tissue (bone) and other features like paired fins and a dorsal nerve cord. Jawless fishes - ....ANSWER ...-The two jawless fish groups are Myxini (hagfish) and Petromyzontida (lampreys). Hagfish slime - ....ANSWER ...-Hagfish slime expands rapidly and is extremely strong and flexible, inspiring bio-materials like kevlar and shark defense technologies. Lampreys impact on Great Lakes - ....ANSWER ...-Parasitic sea lampreys have caused significant damage by sucking blood from fish, leading to overpopulation issues and fishery declines in the Great Lakes. Class Chondrichthyes - ....ANSWER ...-Chondrichthyes are cartilaginous fishes including sharks, skates, rays, and ratfish. The name means 'cartilage fish'. Elasmobranchs - ....ANSWER ...-Elasmobranchs include sharks (~400 species) and skates & rays (~500 species), primarily marine and quite diverse. Shark liver - ....ANSWER ...-The large, oily liver aids in buoyancy since sharks lack swim bladders. …FOR STUDENTS ONLY…©️2025 ALL RIGHTS RESERVED… 1