Each species plays a unique role within a community because of the unique combination of its spatial habitat and interactions with other species. Light energy is converted to chemical energy in carbon compounds by photosynthesis. . Changes to this syllabus For information about changes to this syllabus for 2020 and 2021, go to page 58. 4. Each myofibril is made up of contractile sarcomeres. Characteristics and classification of living organisms. A gene is a heritable factor that consists of a length of DNA and influences a specific characteristic. Competitive exclusion and the absence of predators can lead to reduction in the numbers of endemic species when alien species become invasive. Synovial joints allow certain movements but not others. The rate of transit of materials through the large intestine is positively correlated with their fibre content. Fatty acids can be saturated, monounsaturated or polyunsaturated. Living organisms synthesize many different proteins with a wide range of functions. Independent assortment of genes is due to the random orientation of pairs of homologous chromosomes in meiosis I. Gene loci are said to be linked if on the same chromosome. The loop of Henle maintains hypertonic conditions in the medulla. Arteries convey blood at high pressure from the ventricles to the tissues of the body. To make it easier for teachers to understand what's required, we have: 1. updated the learning outcomes, clarifying the depth to which each topic should be taught. Phosphorylation of molecules makes them less stable. If you are looking at this syllabus, you're likely interested in taking the course or are currently enrolled in the course. Image Credit: International Baccalaureate Organization. Differentiation involves the expression of some genes and not others in a cell's genome. Estrogen and progesterone are secreted by the placenta once it has formed. Triose phosphate is used to regenerate RuBP and produce carbohydrates. There is a delay between the arrival and passing on of a stimulus at the atrioventricular node. IB Syllabus 2020 has been released for the post of ACIO on its official website mha.nic.in. The heart rate can be increased or decreased by impulses brought to the heart through two nerves from the medulla of the brain. Success in plant reproduction depends on pollination, fertilization and seed dispersal. Natural selection can change the frequency of observed animal behaviour. The phases shown in the sigmoid curve can be explained by relative rates of natality, mortality, immigration and emigration. Rods and cones differ in their sensitivities to light intensities and wavelengths. The 5 Strategies You Must Be Using to Improve 4+ ACT Points, How to Get a Perfect 36 ACT, by a Perfect Scorer. Syllabus IB Command Terms Topic 1: Molecules of Life Topic 2: Cells Topic 3: Genes Topic 4: Ecology Topic 5: Evolution Topic 6: Human Physiology Topic 9: AHL Plants Topic 11: AHL Animal Physiology … Carbon dioxide diffuses from the atmosphere or water into autotrophs. SAT® is a registered trademark of the College Entrance Examination BoardTM. hbspt.cta.load(360031, '4efd5fbd-40d7-4b12-8674-6c4f312edd05', {}); Have any questions about this article or other topics? The binomial system of names for species is universal among biologists and has been agreed and developed at a series of congresses. DNA is replicated before meiosis so that all chromosomes consist of two sister chromatids. A protein may consist of a single polypeptide or more than one polypeptide linked together. IB students study a broad spectrum of subjects and engage in research (Extended Essay) and experiential learning through school, community, and international activities. Our new student and parent forum, at ExpertHub.PrepScholar.com, allow you to interact with your peers and the PrepScholar staff. ATP from cell respiration is immediately available as a source of energy in the cell. Carbon dioxide is transformed in red blood cells into hydrogencarbonate ions. Insulin and glucagon are secreted by β and α cells of the pancreas respectively to control blood glucose concentration. Life is based on carbon compounds including carbohydrates, lipids, proteins and nucleic acids. A. Cyclins are involved in the control of the cell cycle. A gene pool consists of all the genes and their different alleles, present in an interbreeding population. Thyroxin is secreted by the thyroid gland to regulate the metabolic rate and help control body temperature. Evolution requires that allele frequencies change with time in populations. Helicase unwinds the double helix and separates the two strands by breaking hydrogen bonds. Both IB Biology SL and HL consist of the same core requirements (95 hours). Hair cells in the semicircular canals detect movement of the head. Immobilized enzymes are widely used in industry. The amino acid sequence of polypeptides is coded for by genes. Fully revised and updated content matching the new Cambridge International Examinations Biology 9700 syllabus for first teaching in 2014 and first examination in 2016. Recent increases in atmospheric carbon dioxide are largely due to increases in the combustion of fossilized organic matter. The warmed Earth emits longer wavelength radiation (heat). ZIMSEC O ‘ Level Specimen Papers November 2021/2022. For first examination from 2022, these resources meet the real needs of the biology classroom. Species tend to produce more offspring than the environment can support. Interactions between species in a community can be classified according to their effect. Bioinformatics plays a role in identifying target genes. The Bohr shift explains the increased release of oxygen by hemoglobin in respiring tissues. Memory and learning involve changes in neurones caused by slow-acting neurotransmitters. Fusion of gametes results in diploid zygotes with two alleles of each gene that may be the same allele or different alleles. Muscle contractions cause the pressure changes inside the thorax that force air in and out of the lungs to ventilate them. If you don't see any interesting for you, use our search form on bottom ↓ . Download it for free now: hbspt.cta._relativeUrls=true;hbspt.cta.load(360031, '688715d6-bf92-47d7-8526-4c53d1f5fe7d', {}); hbspt.cta._relativeUrls=true;hbspt.cta.load(360031, '03a85984-6dfd-4a19-93c8-5f46091f5e2b', {}); As an SAT/ACT tutor, Dora has guided many students to test prep success. A karyogram shows the chromosomes of an organism in homologous pairs of decreasing length. The 5 Strategies You Must Be Using to Improve 160+ SAT Points, How to Get a Perfect 1600, by a Perfect Scorer, Free Complete Official SAT Practice Tests. 11. Diseases and immunity. The myelination of nerve fibres allows for saltatory conduction. Enzyme inhibitors can be competitive or non-competitive. Taxonomists classify species using a hierarchy of taxa. The rate of turnover in the phosphorus cycle is much lower than the nitrogen cycle. Metabolic pathways can be controlled by end-product inhibition. Pathogens can be species-specific although others can cross species barriers. We've written a guide for each test about the top 5 strategies you must be using to have a shot at improving your score. Animals can be cloned at the embryo stage by breaking up the embryo into more than one group of cells. An open reading frame is a significant length of DNA from a start codon to a stop codon. Energy released from carbon compounds by respiration is used in living organisms and converted to heat. Here are the activities: Thinking about taking AP Biology instead? Processes in spermatogenesis and oogenesis result in different numbers of gametes with different amounts of cytoplasm. Chromosomes condense by supercoiling during mitosis. The receptor–hormone complex promotes the transcription of specific genes. Auxin efflux pumps can set up concentration gradients of auxin in plant tissue. The placenta facilitates the exchange of materials between the mother and fetus. Recombinant DNA can be introduced by direct physical and chemical methods or indirectly by vectors. Bones and exoskeletons provide anchorage for muscles and act as levers. TOPICS FOR 0620- IGCSE BIOLOGY EXAMINATION [ VALID FOR EXAMS UPTO 2022 ] 1. Metabolism is the web of all the enzyme-catalysed reactions in a cell or organism. Overweight individuals are more likely to suffer hypertension and type II diabetes. See how other students and parents are navigating high school, college, and the college admissions process. Both classes cover the same six topics in the order listed below with the same subtopics listed below: Only students taking IB Biology HL cover these topics. The composition of blood in the renal artery is different from that in the renal vein. Calcium ions and the proteins tropomyosin and troponin control muscle contractions. The pancreas secretes enzymes into the lumen of the small intestine. Carbon dioxide is produced by respiration and diffuses out of organisms into water or the atmosphere. Surface area to volume ratio is important in the limitation of cell size. The sinoatrial node sends out an electrical signal that stimulates contraction as it is propagated through the walls of the atria and then the walls of the ventricles. ADH controls reabsorption of water in the collecting duct. Both IB Biology SL and HL consist of the same core requirements (95 hours). 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