The phenotypes of polygenic characteristics tend to show continuous variation. Ethology is the study of animal behaviour in natural conditions. Prokaryotes have a simple cell structure without compartmentalization. Molecular biology explains living processes in terms of the chemical substances involved. Studying for the SAT? Fatty acids can be saturated, monounsaturated or polyunsaturated. Speciation due to divergence of isolated populations can be gradual. What is the last date for the submission of the IB ACIO 2021 Online Application? Global temperatures and climate patterns are influenced by concentrations of greenhouse gases. Individuals that reproduce pass on characteristics to their offspring. The nucleic acids DNA and RNA are polymers of nucleotides. Amino acids can be linked together in any sequence giving a huge range of possible polypeptides. Learned behaviour develops as a result of experience. Both IB Biology SL and HL consist of the same core requirements (95 hours). The genome is the whole of the genetic information of an organism. Longer wave radiation is absorbed by greenhouse gases that retain the heat in the atmosphere. The human cerebral cortex has become enlarged principally by an increase in total area with extensive folding to accommodate it within the cranium. Surface area to volume ratio is important in the limitation of cell size. We combine world-class admissions counselors with our data-driven, proprietary admissions strategies. Life is based on carbon compounds including carbohydrates, lipids, proteins and nucleic acids. Made with ♡ by Sagar Aryal. The heart rate can be increased or decreased by impulses brought to the heart through two nerves from the medulla of the brain. This site uses Akismet to reduce spam. Evolution occurs when heritable characteristics of a species change. Nerve impulses are initiated or inhibited in post-synaptic neurons as a result of summation of all excitatory and inhibitory neurotransmitters received from presynaptic neurones. Addiction can be affected by genetic predisposition, social environment and dopamine secretion. Birth is mediated by positive feedback involving estrogen and oxytocin. Recombinant DNA must be inserted into the plant cell and taken up by its chromosome or chloroplast DNA. We want to get you admitted to your dream schools. A gene is a heritable factor that consists of a length of DNA and influences a specific characteristic. Ganglion cells send messages to the brain via the optic nerve. Unsaturated fatty acids can be cis or trans isomers. Methods have been developed for cloning adult animals using differentiated cells. Introduced alien species can escape into local ecosystems and become invasive. Natural selection can only occur if there is variation among members of the same species. The composition of blood in the renal artery is different from that in the renal vein. Animals can be cloned at the embryo stage by breaking up the embryo into more than one group of cells. Air is carried to the lungs in the trachea and bronchi and then to the alveoli in bronchioles. 4. Viruses lack a metabolism and cannot therefore be treated with antibiotics. Fertilization in animals can be internal or external. ATP hydrolysis and cross bridge formation are necessary for the filaments to slide. Bio. Phosphorylation of molecules makes them less stable. Cell respiration is the controlled release of energy from organic compounds to produce ATP. Two species cannot survive indefinitely in the same habitat if their niches are identical. Transpiration is the inevitable consequence of gas exchange in the leaf. The left cerebral hemisphere receives sensory input from sensory receptors in the right side of the body and the right side of the visual field in both eyes and vice versa for the right hemisphere. Check out our top-rated graduate blogs here: © PrepScholar 2013-2018. Incompressibility of water allows transport along hydrostatic pressure gradients. Multiple sequence alignment is used in the study of phylogenetics. (Yep, that includes IB Biology SL/HL exams, too.) We know what kinds of students colleges want to admit. The environment of a cell and of an organism has an impact on gene expression. The information from the right field of vision from both eyes is sent to the left part of the visual cortex and vice versa. Natural selection can change the frequency of observed animal behaviour. Antibiotics block processes that occur in prokaryotic cells but not in eukaryotic cells. Chemoreceptors are sensitive to changes in blood pH. Aerobic cell respiration requires oxygen and gives a large yield of ATP from glucose. IB Diploma Program The International Baccalaureate Diploma Programme is a comprehensive, rigorous program of advanced studies that demands the best from motivated students. Epinephrine increases the heart rate to prepare for vigorous physical activity. Conducting fibres ensure coordinated contraction of the entire ventricle wall. Bones and exoskeletons provide anchorage for muscles and act as levers. Cells can only be formed by division of pre-existing cells. Mitosis is division of the nucleus into two genetically identical daughter nuclei. ADVANCED LEVEL SYLLABUS BIOLOGY - Zimsec. The ultrastructure of the glomerulus and Bowman's capsule facilitate ultrafiltration. B lymphocytes are activated by T lymphocytes in mammals. What SAT Target Score Should You Be Aiming For? Macroplastic and microplastic debris has accumulated in marine environments. Type I pneumocytes are extremely thin alveolar cells that are adapted to carry out gas exchange. Most flowering plants use mutualistic relationships with pollinators in sexual reproduction. Chromosomes condense by supercoiling during mitosis. Genetically modified crop plants can be used to produce novel products. Both classes cover the same six topics in the order listed below with the same subtopics listed below: Eukaryotes have a compartmentalized cell structure. Biogeographic factors affect species diversity. Signals from the sinoatrial node that cause contraction cannot pass directly from atria to ventricles. 302 (Class 12 Biology Syllabus with practical and sample project works) Grade 12 – Botany (Theory) (64 teaching hours) Unit 1 – Plant Anatomy (8 teaching hours) 1.1 Plant anatomy: Concept of tissues, types of plant tissues (meristems and permanent tissues), Anatomy of dicot and monocot root, stem and leaf Secondary growth of dicot stem. Oxygen is produced in photosynthesis from the photolysis of water. Mendel discovered the principles of inheritance with experiments in which large numbers of pea plants were crossed. Pathogens can be species-specific although others can cross species barriers. Consumers are heterotrophs that feed on living organisms by ingestion. In this article, I will go over the topics covered in IB Biology Standard Level and IB Biology Higher Level, as well as the number of hours dedicated to each topic along with what the IB expects you to understand for each topic. Some fatty acids and some amino acids are essential. Memory is the process of encoding, storing and accessing information. The cohesive property of water and the structure of the xylem vessels allow transport under tension. Leptin is secreted by cells in adipose tissue and acts on the hypothalamus of the brain to inhibit appetite. Natural selection increases the frequency of characteristics that make individuals better adapted and decreases the frequency of other characteristics leading to changes within the species. It should wrap, then the bar will grow in height if more space is needed. Cyclins are involved in the control of the cell cycle. Multicellular organisms have properties that emerge from the interaction of their cellular components. Some prokaryotes also have plasmids but eukaryotes do not. Genetic modification can be used to overcome environmental resistance to increase crop yields. An indicator species is an organism used to assess a specific environmental condition. Continuous variation across the geographical range of related populations matches the concept of gradual divergence. Get the latest articles and test prep tips! We'll advise you on how to balance your schedule between regular and honors/AP/IB courses, how to choose your extracurriculars, and what classes you can't afford not to take. Sequence alignment software allows comparison of sequences from different organisms. Different muscles are required for inspiration and expiration because muscles only do work when they contract. Reproductive isolation of populations can be temporal, behavioural or geographic. This delay allows time for atrial systole before the atrioventricular valves close. Although the wording will look different in many places, the teaching content remains largely the same 2. removed and added topics, and moved some content from Cambridge International AS to A Level and vice versa; but the teaching time still falls within the recommended guided learning hours 3. numbered the learning outcomes rather than listed by letter… hbspt.cta.load(360031, '4efd5fbd-40d7-4b12-8674-6c4f312edd05', {}); Have any questions about this article or other topics? Metabolic pathways can be controlled by end-product inhibition. The length of the loop of Henle is positively correlated with the need for water conservation in animals. Mutation, meiosis and sexual reproduction cause variation between individuals in a species. Psychoactive drugs affect the brain by either increasing or decreasing postsynaptic transmission. Arteries convey blood at high pressure from the ventricles to the tissues of the body. Transfer of excited electrons occurs between carriers in thylakoid membranes. A. You also need to complete experiments and experimental reports as a part of any IB Science course. The amino acid sequence determines the three-dimensional conformation of a protein. Animals are either osmoregulators or osmoconformers. Electron microscopes have a much higher resolution than light microscopes. Carbon dioxide is produced by the combustion of biomass and fossilized organic matter. Unlinked genes segregate independently as a result of meiosis. A gene occupies a specific position on a chromosome. DNA differs from RNA in the number of strands present, the base composition and the type of pentose. Type II pneumocytes secrete a solution containing surfactant that creates a moist surface inside the alveoli to prevent the sides of the alveolus adhering to each other by reducing surface tension. Some neurotransmitters excite nerve impulses in postsynaptic neurons and others inhibit them. Taking the SAT in the next month? Muscle contractions cause the pressure changes inside the thorax that force air in and out of the lungs to ventilate them. The loop of Henle maintains hypertonic conditions in the medulla. An axon grows from each immature neuron in response to chemical stimuli. 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. Microorganisms are metabolically diverse. One diploid nucleus divides by meiosis to produce four haploid nuclei. Cambridge AS & A Level Biology 9700 Syllabus 2022-2024 Class 12 Biology (Botany + Zoology) Syllabus 2020 (Nepal) Categories Syllabus Tags Biology Syllabus , IB Biology , International Baccalaureate , Syllabus Post navigation Fusion of a tumour cell with an antibody-producing plasma cell creates a hybridoma cell. Light-dependent reactions take place in the intermembrane space of the thylakoids. Thyroxin is secreted by the thyroid gland to regulate the metabolic rate and help control body temperature. Raised hydrostatic pressure causes the contents of the phloem to flow towards sinks. Ventilation maintains concentration gradients of oxygen and carbon dioxide between air in alveoli and blood flowing in adjacent capillaries. SAT® is a registered trademark of the College Entrance Examination BoardTM. Implantation of the blastocyst in the endometrium is essential for the continuation of pregnancy. © 2021 Microbe Notes. Any textbooks endorsed to support the syllabus for examination from 2015 are still suitable for use with this syllabus. All organisms are classified into three domains. Oh, IB Biology. Estrogen and progesterone are secreted by the placenta once it has formed. The switch to flowering is a response to the length of light and dark periods in many plants. They consist of 60 hours of study. She graduated magna cum laude and scored in the 99th percentile on the ACT. Q. Phosphorus can be added to the phosphorus cycle by application of fertilizer or removed by the harvesting of agricultural crops. Active uptake of mineral ions in the roots causes absorption of water by osmosis. The DP curriculum review is a collaborative process that aims to produce excellent, internationally minded, research-based curriculums and support material that enable students to develop the attributes of the learner profile and the IB mission, thereby providing an … Synapses are junctions between neurons and between neurons and receptor or effector cells. There is a correlation between rising atmospheric concentrations of carbon dioxide since the start of the industrial revolution 200 years ago and average global temperatures. Organisation of the organism. Enzyme catalysis involves molecular motion and the collision of substrates with the active site. Transfer of electrons between carriers in the electron transport chain in the membrane of the cristae is coupled to proton pumping. Many plant species and some animal species have natural methods of cloning. Diploid nuclei have pairs of homologous chromosomes. 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