BIOL 1200 Midterm: Exam 4 Study Guide Part 3
Document Summary
What is the significance of the fossil tiktaalik: it provides the link between the earliest tetrapod to fishes (lungfish) and was the first vertebrate with shoulder bones. The amniota: tetropoda: amphibia, mammalia, lepidosauria, testudinia, crocodilia, and aves, amniota: mammalia, lepidosauria, testudinia, crocodilia, and aves. Reptiles: amphibians: lungs, branchial (gills), and skin (due to it being super thin, moist, and having extensive capillary beds), reptiles: rib-based ventilation of lungs. Which family of amphibians lost their lungs: plethodontidae. Which animal taxa exhibit it: an abrupt, substantial change in morphology from one developmental stage to another in an animal"s life cycle. [(in an insect or amphibian) the process of transformation from an immature form to an adult form in two or more distinct stages]: insects and amphibians. What synapomorphy unites them all: lepidosauria, testudinia, crocodilia, and aves, keratinized epidermal scales. List features that play an important role in bird flight: feathers, lightweight skeleton, pneumatic (air-filled) bones, air sacs, organ reduction.
