In the case of heart failure a donor heart, or heart and lungs can be transplanted. Payment Options Choose to pay in full or spread the cost over our 6 months Higher biology past papers online payment plans. A causal mechanism has been proven for some risk factors, but not in others. The heart is an organ that pumps blood around the body in a double circulatory system.
You will be able to upload your results to our results analysis service. Active transport allows mineral ions to be absorbed into plant root hairs from very dilute solutions in the soil.
Also revise 1 The use qualitative reagents to test for a range of foods e. Iodine reagent is to be used to test for starch every 30 seconds. The right ventricle pumps blood to the lungs where gas exchange takes place. Lipases break down lipids fats to glycerol and fatty acids.
Know that the natural resting heart rate is controlled by a group of cells located in the right atrium that act as a pacemaker. The effects of diet, smoking and exercise on cardiovascular disease.
Follett also stocks countless other books and supporting materials, in print and digital format, from other publishers of IB materials. Will OCR mark the year 10 practice papers? Your Own Dedicated Tutor You are not alone! Carbohydrases break down carbohydrates to simple sugars.
You should be able to translate information between graphical and numerical forms; and extract and interpret information from charts, graphs and tables in terms of risk factors. Knowledge of the blood vessels associated with the heart is limited to the aorta, vena cava, pulmonary artery, pulmonary vein and coronary arteries.
The digestive system is an example of an organ system in which several organs work together to digest and absorb food. Knowledge and understanding of stem cell techniques are not required.
This requires energy from respiration. This means that it can be used to study cells in much finer detail. You should be able to use other models to explain enzyme action.
HT only You should be able to express the answer in standard form. In terms of exchanging substances at various interfaces you should know all about gas exchange in the lungs, the function of villi in the small intestine, leaf structure and gas exchange and how the gills of fish enable an efficient gas exchange.
Diffusion is the spreading of the particles of any substance in solution, or particles of a gas, resulting in a net movement from an area of higher concentration to an area of lower concentration. Organs are organised into organ systems, which work together to form organisms. Severe physical ill health can lead to depression and other mental illness.
Other calculations based on e. This means we now have closed down the IB store store. The IB Store has moved to Follett www. A single-celled organism has a relatively large surface area to volume ratio.
You should have used qualitative reagents to identify biological molecules such as starch, sugars and proteins know the chemical tests for them. Knowledge of the names of the heart valves is not required. Your tutor will remain by your side, throughout your learning journey until you get qualified.
Guaranteed Pass We are so confident in the CloudLearn model of study that we guarantee you will pass your exam. Artificial pacemakers are electrical devices used to correct irregularities in the heart rate. Be able to use models and analogies to develop explanations of how cells divide.
Organs are aggregations of tissues performing specific functions. You should be able to explain how the small intestine and lungs in mammals, gills in fish, and the roots and leaves in plants, are adapted for exchanging materials.
Many diseases are caused by the interaction of a number of factors. Statins are widely used to reduce blood cholesterol levels which slows down the rate of fatty material deposit. Amylase is a carbohydrase which breaks down starch. You should be able to describe how to prepare an uncontaminated culture using aseptic technique Petri dishes and culture media must be sterilised before use to kill unwanted microorganisms inoculating loops used to transfer microorganisms to the media must be sterilised by passing them through a flame the lid of the Petri dish should be secured with adhesive tape to prevent microorganisms from the air contaminating the culture, and stored upside down to stop condensation drops falling onto the agar surface.
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Higher Education; Welsh Baccalaureate Biology specification available in Wales only. The qualification will be first taught from September Create your own practice question paper from thousands of past paper questions. Past papers archive search results for gcse english online. Contribute; AQA Past Papers (OCR) AS Papers.
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Illustrates the standard, structure and requirements of the question papers candidates will sit (includes marking instructions). Higher Biology Specimen Question Paper 1 September ; Higher Biology Specimen Question Paper 2 SeptemberDownload