GEO EXAM 2| 206 Questions| With Complete Solutions

Acanthostega correct answer: 360 MYA, first amphibian/ tetrapod had gills, tail fin, labryinthodont teeth, free digits Arthodires correct answer: 20 ft long, jawed fish, big ass fish, top predator but very slow Amino acids correct answer: proteins of life Agnatha correct answer: chordate jawless fish Lobefin fishes correct answer: more complex, has little paddle like bones; includes lung fish, coelacanth, osteolepiforms. Gave rise to amphibians DNA correct answer: nucleic acid that contains genetic constructions in development of living organisms Rayfin fishes correct answer: flexible spines; actinoptergii: mulitple paired fins, true bone with teeth fused to the jaw bone, swim bladders. Archaea correct answer: prokaryotic organisms, best candidate for earliest life. Isua, Greenland correct answer: first chemical evidence of life, shallow marine vent community C. megalodon correct answer: the megalodon!!! Giant shark found in SC, ate whales Deuterostome correct answer: filter feeders with floating larvae Eryops correct answer: permian amphibian; 5 ft long, sharp conical teeth, small brain BIF correct answer: banded iron formations; layered structures of bands of iron (silver/grey, fe2o3, more o2, less acidic water) and bands of chert (red rock, more acidic water, no O2, sio2) Ichthyostega correct answer: fish like tail on amphibian, 7 toes, spent most of time in water Lung fishes correct answer: freshwater and land; low O2 environments, breathe in stagnant water. Pikaia correct answer: little worm thing that swims, white line down its body is a notochord: like a spine and allows muscles to flex. Trace Fossils correct answer: example: arthopleura: fossil of a footprint, trail, burrow or anything that was a trace of an animal Lateral line correct answer: sensors under sharks skin that monitors pressure and helps sharks find surrounding fish. Eusthenopteron correct answer: devonian fish, had "legs", lobe fin, complex teeth Hallucigenia correct answer: spikey lil dude, sparsa: spikes on top, legs on bottom Labyrinthodont correct answer: pectoral and pelvic fins modified into legs Placoderms correct answer: jawed fish from silurian, shell of head and neck were bone and rest of body was cartilage