BIOL 172 Chordata Exam Guide | 60+ Verified Q&A | Amphibians, Reptiles, Organs, Amniotic Egg – 2026

This BIOL 172 Phylum Chordata 2026 Exam Guide includes over 60 expert-verified questions and answers focused on chordate anatomy, physiology, and classification—especially amphibians and reptiles. Perfectly structured for final exams and lab practicals, this study guide dives into structural adaptations, organ functions, and evolutionary traits of vertebrate groups within Chordata. Key concepts covered include: Amphibians: Thin epidermis, gills in larvae, lungs in adults, reproduction in water, 3-chambered heart Ectothermic, external fertilization, cerebrospinal and peripheral nervous systems Orders: Salientia (frogs/toads), Urodela (salamanders/newts), Apoda (caecilians) Traits like metamorphosis, tail presence, neoteny, amplexus, and body adaptations for jumping or burrowing Reptiles: Terrestrial adaptation, dry epidermal scales, ribs, and larger brain relative to amphibians 3-chambered heart, internal fertilization, amniotic egg with five components: shell, chorion, allantois, amnion, yolk sac Skull features (diapsid condition), cloaca, and sensory organs like tympanic membrane, nictitating membrane Organ functions: Liver (bile production), spleen (blood cell removal), duodenum (digestion), glottis, nares, vomerine/maxillary teeth, and fat bodies for energy storage This document is ideal for: Students in BIOL 172 or organismal biology and comparative vertebrate anatomy Learners preparing for zoology finals, chordate system reviews, or vertebrate evolution assessments Students in pre-med, veterinary, ecology, or biology majors needing detailed trait comparisons Organized in a fast-paced Q&A format, this study guide streamlines memorization while helping students visualize structure-function relationships across key vertebrate groups. Keywords: BIOL 172, chordata exam, amphibians, reptiles, salientia, urostyle, amniotic egg, 3-chambered heart, ectothermic, internal fertilization, cloaca, vertebrate anatomy, vomerine teeth, expert verified