Respiration – Respiration produced water vapour and it is lost in the form of water vapours. The ecology part of the GCSE Biology specification contains many important topics from animal adaptations to biodiversity within plant populations. We do not issue these. It is a segment of nature consisting of a biological community and its physical environment both interacting and exchanging materials as well as energy. Evaporation – water is evaporated from the water bodies like sea, lakes etc and form water vapours. Preserving the biodiversity outside their natural habitat like. Section 4: Ecology and the environment a) The organism in the environment b) Feeding relationships c) Cycles within ecosystems d) Human influences on the. Check out our website for more revision resources and other subjects and levels. Read about our approach to external linking. Breeding programmes are also carried in these areas to increase the population of endangered species. They have thin cuticle, The plants trap insect and digest them to fulfil their nitrogen and mineral requirements, These plants secrete chemicals like alkaloids or tannins to repel insect, Aquatic Plants growing in excess water and less light, Flexible stem to withstand water current. Evolution And Genetics. The BBC is not responsible for the content of external sites. This website and its content is subject to our Terms and Topic 5: Health, Disease and the Development of Medicines. Loss of Biodiversity causing extinction of species. The extinction of a specie or the loss of genetic diversity can cause a reduction in global biodiversity. You can find all Edexcel Biology IGCSE (4BI0/4BI1) Paper 1 past papers and mark schemes below: January 2012 MS - Paper 1B Edexcel Biology IGCSE January 2012 QP - Paper 1B Edexcel Biology IGCSE b) Treat the waste to remove nitrogen and sulphur before evolving. They have hair spaces in leaves. Seedbanks is a store of lots of seeds from different plant […] This section includes recent GCSE Biology past papers from AQA, Edexcel, OCR (Gateway and Twenty First Century), WJEC, CCEA and the CIE IGCSE. Extensive root system to absorb maximum water and succulent stems to store water. 393 Subscribers Subscribe. Edexcel IGCSE Biology Ecology And The Environment, Join Our Free Facebook Group for free tips and tricks to Get A*, Download our Free Guide To get Grade 9 in GCSE and A* in A-Levels, 15 Weeks Revision Plan To get a Grade 9 in GCSE, 15 Weeks WorkPlan to Get A Grade 9 in GCSE, Get A* in GCSE and A LEVEL Science and Maths by Mahima Laroyia. Not all the biomass is eaten by the next trophic level. All Exam Boards students can join. The Transpiration – The water vapours are also lost from the surface of the plants. Revision Summaries for the new GCSE BIOLOGY courses that started with Y10 in Sept. 2016. edexcel igcse biology revision cards Sep 19, 2020 Posted By Roger Hargreaves Ltd TEXT ID d369e484 Online PDF Ebook Epub Library requires some preparation this resource is a collection of questions and answers with pertinent knowledge required for the unit there are revise genetic modification for Plant based product reduces the dependency on animal products. Chromosome – These are the structure that holds our genetic information DNA – Double Helical Structure which contains genetic information Gene – It is the segment of DNA that code for protein Allele – the alternative factors located at the same locus on homologous chromosomes are called alleles. It is the graphical representation of the number of organisms at each trophic level. Photosynthesis required: Carbon dioxide(CO2), Water, Chlorophyll, Sunlight Word Equation for photosynthesis: Chemical equation for photosynthesis: 3 . Conditions. Facebook 0 Tweet 0 Pin 0 Like 0 Share 0 Email 0. There are two papers each for biology, physics and chemistry. Decomposers – Feed on dead and decay matter. They are very important as they return the nutrients and minerals back into the atmosphere. Saved from edexcel-cie.com. PATHOGEN – A pathogen can cause infectious disease d affect the growth of the population and can also wipe the whole population. GENETIC TERMS. Proteins in the dead and decay matter is converted into nitrates and returned to soil. It’s basically everything you’ve ever seen in a Biology textbook reduced into smaller, fun quizzes. When plant based products are used they have the highest biomass and maximum energy as they are at the initial level of food chain. GCSE Biology Ecology learning resources for adults, children, parents and teachers. They have salt glands to expel excess salt. AQA GCSE Biology 8461 2nd Paper (Topics 5-7 & Combined Science Trilogy Biology 2 Topics 5-7) I want to help you achieve the grades you (and I) know you are capable of; these grades are the stepping stone to your future. Banner 3. Factors affecting the rate of photosynthesis: 1) Light […] Topic 4: Natural Selection and Genetic Modification. Cactus where leaves are reduced to spines. Human impact on the environment. Death of other species. Threats to Biodiversity: All factors are interconnected. Students may find it helpful to have personal copies which they can highlight and use at home. It is the graphical representation of energy at each trophic level. Herbivores are dependent on plants for food. Homeostasis And Nervous System. Wind also affects the rate of transpiration. FOOD – Food availability helps the species to grow and reproduce. The GCSE Biology revision section of Revision Science, covering: Cell Activity, Genetics and DNA, Green Plants as Organisms, Humans as Organisms, Living Things in their Environment, Polymerisation of Amino Acids and The Human Body in Action. e.g – pond ecosystem. Like plants are dependent on insects for seed dispersal and pollination. So if one species is affected it can affect the entire population. This is the quick revision to help you cover the gist of everything. You should cover the specification or the textbook thoroughly. © 2019 - Expert Guidance | Designed by ODigiMa, Want to Get A* In GCSE And A-Level Sciences. So if the food chain levels are reduced maximum energy and biomass can be obtained. Topic 2: Cells and Control. COMPETITION – Increasing competition can affect the growth of the population and can outcome the individual of a population. But this is not an alternative to the textbook. Precipitation – When clouds get full the fall of as rain and the cycle continues. registered in England (Company No 02017289) with its registered office at 26 Red Lion Secondary Consumers – They are carnivores or omnivores which feeds on herbivores. Decomposers increasing further decreasing oxygen. These concise and easy to read notes cover all the content required for Edexcel A-Level Biology (B). Quadrat Method – Random squares are placed at different point and the species within that squares are counted. Broad leaves to absorb maximum light. 1. b) Use of microorganisms for food production. Less water limits the photosynthesis and affect the entire food chain, pH – The low pH makes the soil acidic and limits the growth of plants and affect the entire food chain, Temperature – Temperature also limits the rate of photosynthesis which affects the food chain, Oxygen – The oxygen is required for the growth of the plant. 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