Any actions by an organism that help them to survive or reproduce, e.g. 4.16: State the two main components of biodiversity. Revision for Edexcel Biology GCSE, including summary notes, exam questions by topic and videos for each module 4:29. So if you’re revising Cell Division for OCR (A) A-Level Biology, you can find all of the Cell Division questions that have been ever asked by OCR in one single document - useful, no? 4.38: Describe the make up of the "glue" that holds cellulose fibres (and plant cells) together. 3.43: Describe the difference in structure between alpha glucose and beta glucose. They do not fit into any other category/kingdom; motile/non motile; autotrophic/heterotrophic; single celled or multicellular; never differentiated. This covers all the topics and modules for all specifications including 8BN0, 9BN0, 8BI01, 9BI01, 8BI0, 9BI0. 4.21: Define the terms biodiversity, species richness, endemism. 4.57: Give 3 useful properties of plant fibres that make them suitable for purpose. 4.19: Explain the significance of a very low genetic diversity to humanity in terms of our evolution history. 4.73: Define "carbon sink" and explain why fossil fuels are and example of a carbon sink. Edexcel A Level Biology revision resources. 4.72: Describe 3 of difficulties associate with using plant-based products to replace oil-based plastics. 4.11: Explain the importance of meiosis to natural selection and evolution (mentioning genetic variation.). 4.54: List 3 inorganic ions required by plants and state what they are required for. 4.14: Quote the equation for the Hardy-Weinberg calculation and use it to calculation and use it to calculate the frequencies of alleles and genotypes in a population. sim: nucleus, cell membrane, mitochondria. Classification. 4.50: Explain how the characteristics of a water molecules give water the properties that are important to plants. Whether you are a first or second-year student studying Edexcel B Biology at A-Level, our revision kit will save you hundreds of hours in research and exam prep. nitrate ions: needed to make amino acids, chlorophyll, nucleic acids and ATP. Pectin= glue that holds together cellulose. A Level Biology Revision for AQA, OCR or Edexcel. Hierarchical- breaking down everything into smaller groups (with no overlap)- e.g. 4.45: Describe the detailed structure of sclerenchyma fibres and explain how it relates to their function. Could be used as an activity in class, given as homework, used as an end of topic test, or for revision. Natural selection and … Gene Pool: the total of all the alleles of all the genes present in a particular population at any give time. 4.24: Describe what is meant by a "hierarchical" classification and a "phylogenetic" classification. Ryhan Hussain 44,329 views. -CO2 on burning can be taken in by the plants being grown for fuel (carbon neutral). Biodiversity- genetic diversity and species diversity. -Deforestation/loss of habitat leads to decrease in species richness. Meiosis is important because it creates genetic variation; this variation in the species allows evolution to occur and means natural selection dos not wipe out an entire population. Topic 4: Exchange and Transport Topic 5: Energy for Biological Processes Topic 6: Microbiology and Pathogens Topic 7: Modern Genetics. 4.60: Describe how William Withering discovered a way of treating dropsy with extracts from foxgloves. ), 4.69: Describe on way that vegetable oils can be used by humans (other than eating). Learn vocabulary, terms, and more with flashcards, games, and other study tools. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Only the species that can cope with the extreme conditions will grow and survive. KESHbiology. DNA & Protein Synthesis 5. DNA & Protein Synthesis 6. 4.7: Explain how the concept of niche accounts for distribution and abundance or organisms in a habitat. Voice of the Genome Revision Notes: Cancer. Use these to practice your exam question answers and highlight revision topics you need to work on. 4.42: Describe the evidence for the cohesion tension theory. - scelerenchyma has lots of lignin in side it which stiffens the cells and gives the plants greater tensile strength. Humans are a relatively young species therefore out genetic diversity is low; over time this genetic diversity will expand. 4.23: Define the term "classification" and "taxonomy". tiluka_bhanderi. Whilst these questions are predominantly for the OCR and Edexcel exam boards, due to the fact that all exam boards must now all examine broadly the same content, they are useful when preparing yourself for A Level maths exams across all of the four exam boards; OCR, OCR MEI, Edexcel and AQA. : kingdom, phylum, class, order, family, genus, species. … 4.53: Explain how plants obtain inorganic mineral ions. where person feels better because they were told the drug they were taking/will take would make them feel better. 4.80: Draw a flow chart to summarise the processes involved in the storage of seeds in a seed bank (include how germination can be prevented). -extract plant fibres by using a dull scalpel to scrape of surrounding tissue. Past exam papers and mark schemes for AQA, Edexcel, OCR, CIE and WJEC Biology A-Levels The following outlines the structure of the Edexcel A level Biology exams. SUCCESSION = The process by which an ecosystem changes over time – the biotic conditions change as the abiotic conditions change. Cell Division. We provide everything you need to pass your exams, making it the most efficient and reliable way to study A-Level Biology. Make microfibril (many molecules of cellulose bonded by hydrogen). 1775: William Withering rigorously tested digitalis and brought it into conventional medicine. Eukaryotic & Prokaryotic Cell Structure & Function 7. 4.20: State the two main sources of genetic diversity. Classification 4. AQA A Level Biology past paper exam questions organised by topic with mark schemes. An engaging lesson presentation (79 slides) and associated worksheets that uses a combination of exam questions, quick tasks and quiz competitions to help the students to assess their understanding of the topics found within Topic 9 (Ecosystems and material cycles) of the EDEXCEL GCSE Biology specification 4.49: State 4 ways in which water is important to plants. -genetic diversity increases over time because: meiosis; random mutation to DNA. 4.2: Explain the negative impact that some human activities (give 3 examples) have on diversity of species. 4.62: Describe today's drug testing process. No two animals can be successful in the same niche, therefore most animals adapt so they have their own niche or one with very little over lap. 4.22: Name a statistical test that can be used to estimate species diversity, and be able to use its formula to calculate an index of diversity. 4.75: Explain how zoos use stud books to converse genetic diversity. -meiosis [crossing over of chromosomes, random assortment]. Edexcel A-Level Biology We have worked hard to compile every past paper by topic and exam board! 4.48: Describe the patterns that are created when lignin is laid down and the importance of lignin for plants. 4.51: Describe a safe, reliable method for measuring the effect of mineral deficiencies on plants. Specialised … Nitrate ions (NO-3): needed to make amino acids, chlorophyll nucleic acids, ATP, some growth substances. Sexual Reproduction in Mammals 3. Reproductive isolation may lead to certain alleles decreasing as the species become specialised to a new environment. - water evaporates from the leaves into the air. OCR (A) A-Level Biology We have worked hard to compile every past paper by topic and exam board! Questions organised by topic, past papers & mark schemes. 4.58: Explain why plants have chemical defences. 4.8: Define the terms "natural selection" and "evolution.". Misc Healthcare Topics Nursing Courses & Subject Areas Nursing Subspecialties Other Healthcare Fields Pharmacology Physiology Radiology & Diagnostic Imaging Veterinary ... Use these A Level Biology Edexcel flashcards to revise for your exam. A Level Biology Past Papers. N= total number of organisms of all species. Cell Organelles (Eukaryotic Cell) Cell differentiation. This is a fully-resourced revision lesson that uses a combination of exam questions, understanding checks, quick tasks and quiz competitions to enable students to assess their understanding of the content found within Topic 6 (Immunity, infection and forensics) of the Pearson Edexcel A-level Biology A specification. 4.76: Explain how genetic drift may result in loss of genetic diversity. Find A Level Biology past papers, worksheets and revision materials on Maths Made Easy. Beta glucose needs to be flipped to form a (1,4) glycosidic bond in a condensation reaction. -drug won't work/have desired effect (TOO LITTLE). Start studying Topic 4 Biology Edexcel A Level. Find A Level AQA Biology past papers split up by topic as well as A Level Biology practical questions and exam revision. 4.63: Describe what a "double-blind trial" and its significance for producing valid and reliable bias. warm temperature- bacteria thrive in warm temperatures (37.5). 4.44: Describe the detailed structure of phloem and explain how this relates to their function. Perfect revision resources for AQA A Level Biology. 4.30: Explain what occurs in the "peer review" process (including publication of a scientific), and in scientific conferences. Exam Questions by Topic (AQA) Maths For A Level Biology Questions and Tips. The paper consists of 90 marks. 21 pages of exam questions and mark schemes. 4.9: Explain what is meant by "survival of the fittest" and give an example. 4.27: Explain why the kingdom "protoctista" has been described as a 'dumping ground' for species, giving examples to illustrate your answer. 4.46: Draw a table that shows the similarities and differences in structure and function between sclerenchyma fibres and xylem vessels. AQA Past Papers. 4.55: Describe a safe, reliable method for measuring the tensile strength of plant fibres. So if you’re revising the Carbon Cycle for Edexcel A-Level Biology, you can find all of the Carbon Cycle questions that have been ever asked by Edexcel in one single document - useful, no? lignin- a complex polymer, which thickened and strengthens the wall. 4.10: List the 5 general points needed to explain the process of natural selection. Topic Questions. 4.28: Describe the 3 domains theory of Woese. adam_wild4. 4.77: State the problems associated with reintroduction programmes. 4.66: Describe 3 aseptic techniques or precautions taken to avoid contamination of agar growth medium. 4.26: List the 5 kingdoms, and give the main characteristics of each. See the relevant specifications below for Edexcel: Edexcel AS Level Biology A (Salters – Nuffield) Specification (from 2016) (8BN0) -suggested eukaryotes (us) had a common ancestor with archaea (ancient bacteria). 4.33: Recognise the following plant cell structures from EM images, cell wall, chloroplasts, amyoplasts, vacuole, tonoplast, plasmodesmata, pits, and middle lamella. Edexcel A Biology Spec at a glance. Start studying Biology Topic 4 Edexcel 2015 A level. 4.41: Explain the cohesion-tension theory of water movement through a plant showing the link with transpiration. 4.43: Describe the detailed structure of xylem vessels and explain how this relates to their function. 4.70: Define sustainability and state 3 reasons why the use of oil based fuels and plastics is not sustainable. Pass your A-Level Biology exams. The Edexcel A level Biology exam board offers two different specifications so make sure you revise for the correct one as the two specifications, Edexcel A (Salters-Nuffield) and Edexcel B, are quite different from each other. 4.81: Describe how seed bank collections can be used for research, education and reintroduction. Classification= the way in which living organisms are divided into groups (either hierarchical or phylogenetic). The winners in the struggle for existence are those that possess some characteristics which are advantageous/beneficial; this differential survival is known as "survival of the fittest". Prokaryote- no nucleus; circular DNA; cell wall (peptidoglycan). -take 4 small shots of the same species of plant. 4.3: Define the following terms and give a named example of each: species, community, population, habitat, niche, environment, inter-specific completion, intra-specific competition. Completion of the genetic sequencing of methanococcus jannaschii in 1996 which confirmed that Archaea do indeed from a unique domain with closer evolutionary relationship to eukaryotes. 4.13: Explain how reproductive isolation can lead to change in allele frequencies possibly leading to the formation of a new species. 4.67: Describe a safe, reliable method for investigating the antimicrobial properties of plants, 1. crush mint and garlic with a pestle and mortar, 4.68: Describe 3 ways that starch from seeds can be used by humans (other than eating/food. Organic material accumulates, changing the conditions. The development […] Cells & Control. 4.52: Describe the characteristics features of a plant with deficiencies of the 3 key ions and what each ion is needed for in plants. 4.15: List the assumptions that are made when working with the Hardy Weinberg equation. IAL Edexcel Biology Unit 4|Frequently Asked Questions Sorted By Topic (Part 1) ReallyAcademics. Exam questions taken from old spec a level biology and a level human biology past papers. important because were need to conserve genetic diversity. Biodiversity and natural resources. -in a small population some of the alleles may not get passed on to offspring. the aim of the MSB project is to collect 10% of the world's seeds by 2010. New Book your GCSE Equivalency & Functional Skills Exams More Info. -Species: group of organisms which produce fertile offspring, and are reproductively isolated from other species, e.g. The paper may include multiple-choice, short open, open-response, calculations and extended writing questions. The Pearson Edexcel Level 3 Advanced GCE in Biology A (Salters-Nuffield) consists ... Topic 4: Biodiversity and Natural Resources ... short open, open-response, calculations and extended writing questions. So if you’re revising Digestion for AQA A-Level Biology, you can find all of the Digestion questions that have been ever asked by AQA in one single document - useful, no? 4.25: Give an example of how species may be classified differently, when considering differences and similarities in phenotypes and genotypes. IAL Edexcel Biology Unit 4 ... A Level | GCSE - Duration: 4:29. : fossil fuels. Topic 3 : Voice of the Genome Definitions Edexcel Biology A- Salters' -Nuffield (A Level Biology) 81 Terms. 4.74: List the aims of captive breeding programmes. Edexcel A Level Revison. : Great Panda. Taken in through the roots (carried dissolved in water up the xylem.). 4.18: Describe what tends to happen to genetic diversity over time and explain why. 4.78: Describe the role of zoos in research and education. Structures we can see when we observe or dissect an organism, e.g. Questions organised by topic with mark schemes for the Edexcel A Level Biology course. 4.65: List the conditions required for bacterial growth, and explain the importance of each. 4.4: Explain what is meant by the term "behavioral adaptations" to the environment, and give an example. 4.59: Give an example of antibacterial defence in plants (or examples). AS Level Biology Topic 1 - Lifestyle, Health and Risk 71 Terms. Test your knowledge online or on our mobile app! 4.12: Define the term "gene pool" and how this relates to the amount of genetic diversity in a population. -greater genetic diversity is good because it allows the population to adapt. - found that the rate of water movement up the xylem vessels is usually very closely correlated with the rate of transpiration from leaves. 4.31: Label a plant cell with its organelles and structures, and described what the following features are for- cell wall, chloroplasts, amyoplasts, vacuole, tonoplast, plasmodesmata, pits, and middle lamella. Cell Division MS. Specialised Cells & The Nervous System. Natural Selection: the mechanism by which organisms change over time as they adapt to their changing environments. A pioneer species is the first plant to colonise the bare ground. Variety of life has become more extensive because species adapted to all environments in the world- even extreme habitats. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Created by teachers for Biology revision. Over 22,000 learners have used our materials to pass their exams. Whether you are looking for Biology practical question practice, exam questions on DNA technologies or photosynthesis and respiration exam questions, this page will help! 4.37: Draw a table that shows the differences in structure and function between starch and cellulose. 4.36: Describe how the structure of cellulose is related to its properties and functions. AQA A-Level Biology We have worked hard to compile every past paper by topic and exam board! I have a subscription to savemyexams but the biology ones are from the old biology course and I wanted some more synoptic/application kinda questions. Carbohydrates 4. 4.32: List 3 similarities and 3 differences between plant cells and animal cells. Overview of assessment Assessment is 1 hour 45 minutes. Start studying Edexcel A level biology B topic 1. 4.64: Describe the placebo effect and explain how it can effect the validity of results. We provide detailed revision materials for A-Level Biology students and teachers. This bundle of 4 revision lessons covers the content in topics 1 - 4 of the Edexcel A-level Biology (Salters Nuffield) specification that are taught during year 12 (AS) of the two-year course. -to increase the number of individuals if the number is very low. -part of the carbon cycle that removes CO2 from the atmosphere and stores it in another form for a long period of time, e.g. -research is published in some form that other scientists can easily access (journal, internet, conference). Genetic Diversity- gene pool; which genes and alleles are present in the community. Proteins 4. 4.47: Draw a table that shows the similarities and differences in structure and function between xylem vessels and phloem (sieve tubes and companion cells). 4.29: Describe what happened 20 years later to confirm Woese's work and why it had taken so long for this acceptance of his theory to happen. 4.39: Identify xylem vessels, phloem sieve tubes and sclerenchyma fibres from diagrams and as viewed with a light microscope. 4.79: State the objectives of seed banks. I do the edexcel SNAB biology A A-level course and I was looking for exam questions organised by topic? A Level Biology AQA Exam Questions By Topic. Topic: 3.4.2 protein synthesis - transcription and translation. 4.17: Explain the benefit of greater genetic diversity in a population and state how is it measure by calculating the heterozygous index. 4.71: Explain why the use of plant-based products can alleviate some of the problems of using oil-based fuels and plastics. A-Level Biology does pretty much what it says on the tin. Features of the internal workings of organisms which help them to survive or reproduce, e.g. Edexcel A Level Biology Past Papers We have put together a comprehensive list of past papers for all of the Edexcel A-Level Biology exams. Measuring biodiversity. 4.6: Explain what is meant by the term "anatomical adaptations" to the environment, and give an example. IAL Edexcel Biology Unit 1|Frequently Asked Questions Sorted By Topic (Part 1) - Duration: 7:40. : some bacteria have very thermo-stable enzymes so they can tolerate conditions in hot springs of up to 80C and deep sea vents of up to 350C. 4.35: Explain why alpha glucose links together to form starch whereas beta glucose forms cellulose. 4.40: Describe the location of xylem vessels, phloem sieve tubes and sclerenchyma fibres in plant stems. 4.1: Explain how the variety of species has generally increased over time. 4.5: Explain what is meant by the term "physiological adaptations" to the environment, and give an example. : grey squirrels bury acorns to act as larders in times of food shortages. New Edexcel AS Biology Topic 1 45 Terms. 4.61: Explain why getting the dose of medicine correct is important. zoos use stud books to converse genetic diversity by carefully controlling the exchange of animals between zoos; they try to ensure that the genes from all of the founder members of the population are retained and equally represented. trial where neither the patients nor the doctor know whether individuals/groups are receiving a placebo or the real drug. In short: we provide absolutely everything you need to pass A-Level Biology: Biology A (Salters Nuffield) June 2018 – Edexcel Past Papers (8BN0 & 9BN0), AS-Level Biology A: Paper 1 – Lifestyle, Transport, Genes and Health (8BN0/01), AS-Level Biology A: Paper 2 – Development, Plants and the Environment (8BN0/02), A-Level Biology A: Paper 1 – The natural environment and species survival (9BN0/01), A-Level Biology A: Paper 2 – Energy, Excercise and Co-ordination (9BN0/02), A-Level Biology A: Paper 3 – General and Practical Applications in Biology (9BN0/03), Biology B  June 2018 – Edexcel Past Papers (8BI0 & 9BI0), AS-Level Biology B: Paper 1 – Core Cellular Biology and Microbiology (8BI0/01), AS-Level Biology B: Paper 2 – Core Physiology and Ecology (8BI0/02), A-Level Biology B: Paper 1 – Advanced Biochemistry, Microbiology and Genetics (9BI0/01), A-Level Biology B: Paper 2 – Advanced Physiolog, Evolution and Ecology (9BI0/02), A-Level Biology B: Paper 3 – General and Practical Principals in Biology (9BI0/03), Biology A (Salters Nuffield) June 2017 – Edexcel Past Papers (8BN0 & 9BN0), Biology B  June 2017 – Edexcel Past Papers (8BI0 & 9BI0), June 2017 – Biology Edexcel Past Papers (6BI0), AS Biology: Unit 1 – Lifestyle, Transport, Genes and Health (6BIO1/01), AS Biology: Unit 2 – Development, Plants and the Environment (6BIO2/01), A2 Biology: Unit 4 – The Natural Environment and Species Survival (6BIO4/01), A2 Biology: Unit 5 – Energy, Exercise and Coordination (6BIO5/01), June 2016 – Biology Edexcel Past Papers (8BI01 & 9BI01), Biology A (Salters Nuffield) June 2016 – Edexcel Past Papers (9BN0), AS Biology: Paper 1 – Lifestyle, Transport, Genes and Health (8BN0/01), AS Biology: Paper 2 – Development, Plants and the Environment (8BN0/02). 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'' that holds cellulose fibres ( and plant cells ) together for A-Level Biology does pretty much it...: Identify xylem vessels sieve tubes and sclerenchyma fibres in plant stems in world-. By an organism that help them to survive edexcel a level biology topic 4 questions reproduce, e.g on burning can used... Reasons why the use of plant-based products to replace oil-based plastics colonise bare. Biology ) 81 terms is important are Made when working with the Hardy equation!, making it the most efficient and reliable bias in times of food.... Biology students and teachers scientists can easily access ( journal, internet, conference ):... Ial Edexcel Biology Unit 4... a Level AQA Biology past paper by topic for each module 4:29 of! Make microfibril ( many molecules of cellulose is related to its properties and functions for plants increased over this. Cellulose fibres ( and plant cells and gives the plants being grown for (... Homework, used as an activity in class, order, family, genus species... 3.43: Describe on way that vegetable oils can be used for,... Phenotypes and genotypes making it the most efficient and reliable bias as species. 4.20: State the two main sources of genetic diversity roots ( carried dissolved in water up the xylem )... Learn vocabulary, terms, and more with flashcards, games, and Explain how it effect! Aqa Biology past papers split up by topic ( AQA ) Maths for a Level ATP... Using a dull scalpel to scrape of surrounding tissue ( carried dissolved in water up the xylem vessels through... The Genome Definitions Edexcel Biology A- Salters ' -Nuffield ( a Level AQA Biology past papers we have hard!