bio notes test 2 - HyeYun Lee 1 Essays: 1. Compare/Contrast...

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HyeYun Lee Essays: 1. Compare/Contrast Eukaryotic and Prokaryotic cells; 2. Biochemical Evolution of Life (4 steps) 3. Meiosis/Mitosis 4. Speciation (kinds and modes) 5. Spark-Discharge apparatus Test 2 Materials 1 st quiz material Evolution of Species species : kind or appearance; subtle differences Ernst Mayr (Harvard) o used birds as mechanism for evolution studies o 1927- led an expedition to New Guinea-Arafak Mtns. Native tribes had 137 different names for local birds—Scientists found 138 different species typological species : (believed during Aristotle’s time) static immutable species; and we lived in real eternal world morphological species or morpho species : (used by Linnaeus) designation of a species by its morphology, shape and form; used today more than the others biological species : genetically distinct group of natural populations that share a common gene pool and are reproductively isolated from other such groups *REPRODUCTIVELY ISOLATED* o conspecifics : refers to a level of genetic relatedness between individuals, genetic and phylogenetic ties members of the same species reproductively compatible; can be geographically apart from each other o intraspecific : situations or encounters that occur in the same species example: two white throated sparrows fighting for food o interspecific : situations or encounters that occur in two different species example: a blue jay and cardinal fighting for food behavior: example: surface feeding ducks, diving ducks; can be used to taxonomically classify organisms final criteria for classification: gene flow of lack of is the main criteria for classification; termination or cessation of gene flow, also anatomical, physiology, ecological and behavioral Biological Species biological species : genetically distinct group of natural populations that share a common gene pool and are reproductively isolated from other such groups Other theories: o Recognition defines a species by its set of characteristics that maximize successful mating with members of the same population o Cohesion concept 1
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HyeYun Lee Says that a distinctive, integrated set of adaptations has been refined in the evolutionary history cohesion of phenotype is the basis of species integrity Flaws with Bio-Species o Hybridizations Examples Gray Wolf (Canis Lupis) + Alaskan Husky= Pawnee Female African Lion + Male Siberian Tiger= Tiglon o short mane, light tan, dark brown vertical stripes that blend in with tawny fur, spots on forehead Male African Lion + Female Tiger= Liger Mallard + [insert duck here] o black ducks declined dramatically in eastern US due to mating with the mallard ducks usually sterile o Asexual Reproduction (binary fission) examples: prokaryotes, fungi, and protests o Varying across distance Ex-Deer Mouse they form a diamond shape with some corners cross breading and others not. This allows gene flow between populations indirectly
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bio notes test 2 - HyeYun Lee 1 Essays: 1. Compare/Contrast...

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