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Synthesis of organic molecules 2. Synthesis of polymers from organic molecules water tends to depolymerize molecules 3. Mechanisms for the self-replication of organic molecules 4.
Packaging of these molecules inside of membranes Miller and Urey Experimentally reproduced organic molecules from hypothesized conditions gases methane, hydrogen, ammonialiquid water in evaporated and condensed formswarm temperature, exposure to UV radiation, lightning of pre-biotic Earth.
Possible locations where conditions would have allowed the synthesis of organic compounds 1.
Intertidal zones drying of clay particles, where stromatolites one of the most ancient forms of life on earth are found 2. Deep-sea hydrothermal vents there is evidence of life 3. Volcanic areas rich sources of raw materials, Ib biology hl paper 3 format of volcanic activity 4. Able to replicate without the aid of enzymes unlike DNA 2.
RNA can act as an enzyme called ribozyme to facilitate certain chemical reactions Protobionts Protobionts can maintain an internal chemistry that is different from their surroundings; they protect polymers 1.
Coacervate can form spontaneously due to the hydrophobic forces between water and lipid molecules; allows selective permeability Endosymbiotic theory for the origin of eukaryotes States that the organelles found inside cells today were once independent prokaryotes. Does not explain how the host cell can pass on the genetic code to synthesize the newly acquired organelle to its offspring.
Autotrophy was an advantage, especially because there was a food shortage, allowing photosynthetic bacteria to proliferate. Those that survived were sheltered from the oxygen in mud, in the guts of living organisms.
Half-life The time it takes for half of a radioactive isotope to decay for a radioactive isotope to give off half of its original level of radioactivity Dating rocks and fossils using radioisotopes Radioisotopes are unstable isotopes that release some of their subatomic particles alpha and beta in order to reach a stable state.
Radiometric dating is accomplished through looking at the proportion of the radioisotope to other isotopes. Two common radioisotopes are carbon decays into stable daughter isotope nitrogen and potassium dating rocks. Major anatomical features that define humans as primates 1.
Opposable thumbs and hands with fingers capable of great dexterity 2. Shoulder sockets capable of complete circular motion 3. Forward-facing eyes giving us stereoscopic vision Possible coexistence of several species Australopithecus afarensis and australopithecus africanus plenty of time to encounter each other however very few in numbers Homo erectus, Homo neanderthalensis, Homo sapiens Very few in numbers, possible geographic isolation; H.
Fossils for some species are rare or not well preserved. Estimations about characteristics can be imprecise because of the differences between different members of the population.
Control of fire, increase in complexity of tools and development of a more complex social system was probably necessary for hunting and consuming meat, and evolved as a result of larger cranial capacity.
Neanderthals had larger cranial capacities than modern humans yet they did not have significantly different diets Genetic evolution Deals with inherited characteristics such as body morphology cranial capacity, skull shape, height, robustnessnumber of chromosomes, and particularities of biochemicals blood proteins.
These characteristics must be passed on from parent to offspring genetically. Cultural evolution Deals with acquired knowledge including language, customs and rituals, art, and technology. These can be passed on through communication. Importance of genetic and cultural evolution Cultural evolution can sometimes lag behind genetic evolution.
Currently though, the pace of cultural evolution has surpassed the pace of genetic evolution for Homo sapiens. Africa Tall lower jaw.Biology Hl Ib Paper 3 >>>CLICK HEREBiology hl ib paper 3 Rhondda, Cynon, Taff edit my course work on management for 10 online reports dr lal path lab iron on paper cheap.
IB students are evaluated externally, two ways. One way is through the internal assessment lab report, which accounts for 20% of the overall IB score. The second way is through the external assessment, which consists of three papers or exams.
Each paper has a . of strings. (Paper 3) IV. Sample questions * the syllabus for examinations current until Assessment for physics higher level III. Assessment model (Paper 1) The following questions appeared in previous IB Diploma Programme physics higher level examinations.* Group 4 collaborative, interdisciplinary project Computer simulations and data-.
LanternaEducation®’ Page3! thattheIBOliketorepeatque stions,soifanythingpracticingcanjust! helpboostyourconfidenceandkeepthosenervesincheckforthebig. The structure of the IB History Exam The IB History exam consists of three papers: Paper 1 - one hour, primary document analysis Paper 2 - 90 minutes, answer two essay questions Paper 3 - minutes, answer three essay questions Papers 1 and 2 will be based on material from your HOA Year 2 class, while Paper 3 will cover your HOA Year 1 class.
May 09, · Tips for the IB History Exams Tips for Paper #3 Paper #3: The History of the Americas Answer 3 questions out of Pick 4 to 5 of the topics below and concentrate all of your studying in those areas.
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