Download Exam 1 Questions and Answers for WMAN 224 and more Exams Nursing in PDF only on Docsity! WMAN 224 Exam 1 questions well answered already passed What concepts did Darwin bring to the table - correct answer ✔✔survival of the fittest, descent with modification bottleneck effect - correct answer ✔✔dramatic reduction in population size founder effect - correct answer ✔✔change in allele frequencies due to migration of a species what is true of natural selection - correct answer ✔✔its easier to subtract than add, and its easier to modify than add analogous characteristics - correct answer ✔✔derived independently, same function homologous structures describe - correct answer ✔✔relatedness symplesiomorphy - correct answer ✔✔shared primitive characteristics, traits unchanged from an ancestor that are inherited automorphy - correct answer ✔✔unique, derived traits why is automorphy beneficial - correct answer ✔✔tells us lineage is different, cant link lineages evolutionarily synapomorphy - correct answer ✔✔shared, derived characteristic, traits different from an ancestor and shared by 2 or more lineages convergent evolution - correct answer ✔✔external forces create similar species and niches divergent evolution - correct answer ✔✔a single colonization event leads to divergent populations species - correct answer ✔✔individuals that look similar, occupy the same niche, and interbreed 2 types of speciation mechanisms - correct answer ✔✔postzygotic, prezygotic prezygotic barriers - correct answer ✔✔habitat isolation, temporal isolation, behavioral isolation, mechanical isolation, gametic isolation postzygotic barriers - correct answer ✔✔no offspring, offspring not viable, inbreeding how many species have been described - correct answer ✔✔1.5 million how many species not described - correct answer ✔✔2-100 million species 3 pieces of evidence of natural selection from grant and grant - correct answer ✔✔drosophilia genotypes affected by climate, gene frequencies vary, natural selection is a causal agent 3 domains of life - correct answer ✔✔bacteria, archaea, eukarya kingdoms - correct answer ✔✔animalia, plantae, fungi, protozoa, chromista systematics - correct answer ✔✔study of diversification of life forms True or false: Vertebrates make up a fraction of biodiversity - correct answer ✔✔True, around 4% What makes a cordate - correct answer ✔✔notochord, dorsal hollow nerve chord, pharyngeal gill slits, segmented muscular postanal tail, endostyle Ampullae of Lorenzini - correct answer ✔✔special sensing organs called electroreceptors, forming a network of jelly-filled canals; these organs help sharks sense electric fields in the water tapetum lucidum - correct answer ✔✔eye shine 3 sensory systems of chondricthyes - correct answer ✔✔tapetum lucidum, nictating membrane, lateral line lateral line - correct answer ✔✔senses changes in water pressure isomolal - correct answer ✔✔isotonic- body fluids and environment at equilibrium hyposmolal - correct answer ✔✔hypotonic, body fluid concentration lower than surrounding environment hypermolal - correct answer ✔✔hypertonic, body fluid concentration higher than surrounding environment osmoregulation - correct answer ✔✔water follows the solute, water crosses semi permeable membrane what class keeps urea in body to balance osmotic pressure - correct answer ✔✔condricthyes what class practices constant tooth replacement - correct answer ✔✔condricthyes Subclass Holocephali - correct answer ✔✔chimeras and ratfish Subclass Holocephali characteristics - correct answer ✔✔strange deepwater group, venomous first dorsal spine Subclass Elasmobranchii - correct answer ✔✔sharks, skates, rays Subclass Elasmobranchii characteristics - correct answer ✔✔diverse reproduction, reach sexual maturity late in life, hyostillic jaw suspension, mostly ectothermic, many are top tier predators, parthogenesis can occur rete mirabile - correct answer ✔✔allows shark to be endothermic due to capillaries between swimming muscles Superorder Batoidea - correct answer ✔✔skates and rays superorder batoidea characteristics - correct answer ✔✔dorsoventrally compressed, euhyostyly Euhostyly - correct answer ✔✔no direct contact of upper jaw with cranium differences between skates and rays - correct answer ✔✔skates have a 2 lobed pelvic fin, stocky tail, are egg laying, and have a prominent dorsal sin Superorder Squalomorphi - correct answer ✔✔shark like, no anal fin, primitive
