1.1.1 In small unicellular organisms‚ substances move around slowly by diffusion. Diffusion is too slow to move substances round the larger bodies of multicellular organisms. They have a circulatory system: substances are carried in blood pumped by a heart. In a closed circulatory system (eg in vertebrates) blood is enclosed in narrow blood vessels. This increases efficiency: blood travels faster as a higher pressure is generated. Valves ensure blood flows in one direction:
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Biology End of Year Revision Quick Recap on Graphs: * Always remember to include units * Put the dependent (thing you measure) along the y-axis. (One going up) * Put the independent (thing you change) on the x-axis (along the bottom) * Don’t join the dots up‚ draw a line of best fit. * Circle anomaly result. Healthy Diet For a healthy diet‚ you need energy. So you need: CARBOHYDRATES‚ to release energy. FATS‚ to keep warm and release energy PROTEIN‚ for growth cell
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The Odyssey: Father-Son Relationships The Odyssey introduces the theme of father-son relationships to exemplify how influential fathers were at the time. Fathers act as role models to their sons and can determine their actions‚ even while being absent from home for long periods of time. Nestor’s son‚ Pisistratus‚ is a respectful and courteous man. His manners could be attributed to King Nestor’s piety. King Nestor offers sacrifices to the gods‚ as seen at the beginning of book IIV‚ when his people
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GEOGRAPHY AS LEVEL REVISION NOTES: Population Change All Definitions: Population structure: the breakdown of a country’s population into groups defined by age and sex. Death Rate: the number of deaths per thousand population per year‚ expressed as deaths per thousand Age specific Death Rate: this shows death rates per thousand population by sex or age groups. Birth Rate: the number of live births per thousand population per year‚ expressed as births per thousand Infant Mortality: a measure
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Genes are found in our chromosomes‚which parents pass on to offspring in their sex cells in reproduction. Different versions of the same gene are called alleles‚ and these can determine features like eye colour‚ and the inheritance of disorders such as cystic fibrosis. DNA the nucleus controls the activities of a cell. The instructions for how an organism develops are found in the nuclei of its cells Chromosomes Chromosomes are structures found in the nucleus of most cells. They consist of long
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WATERY WORLD Water Usage in HICs Agriculture (39%) – use water to irrigate crops‚ using automated machines that use lots of water. Industry (47%) – Water is used in production and for cooling. Some use 1million litres a day Domestic (14%) – piped water supplies used for baths (150L) and washing machines (100L) other Water Usage in LICs Agriculture (91%) – Less efficient and require man power. Water is wasted in evaporation. Industry (5%) – There is less industry‚ more small cottage shops
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Circulatory systems Closed circulatory systems: • Blood leaves heart under pressure to arteries then arterioles then capillaries. • Capillaries come in large numbers. They exchange substances between the blood and cells. • After passing through capillaries‚ blood goes back to the heart via veins. • Valves in the veins ensure that blood only flows in one direction. Single circulatory system: • Heart pumps deoxygenated blood. • Gaseous exchange (diffusion of CO2 from blood to H2O and diffusion
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Ethical Responses to abortion Utilitarianism Is teleological‚ concerned with outcomes. Utilitarians would ask whether having an abortion brings about the greatest good. Having an abortion because of financial pressures‚ other family members’ needs‚ education‚ work - any of these reasons may be justified by the hedonic calculus. Utilitarianism challenged traditional views that abortion was an ’evil’ act‚ arguing instead that the end justifies the means. Utilitarianism generally supports a pro-choice
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P3 In this assessment I will be explaining recent demographic change within their home country. Demographic is a term used to describe the study of changes in the size and structure of the population. The demographic examine wider changes in the population. Through researching looking at older people and how they caused demographic changes in home county (England) i have found out that now people will live much longer‚ more than they used to. Throughout year’s things like the health care and the
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Unit 3: Introduction to Marketing P3: Describe how a selected organisation uses marketing research to continue to the development of its marketing plans Marketing Research is the collection analysis and communication of information which assists decision making when marketing. Systematic research is organised with a clear method‚ gathering research is collecting the correct and appropriate data. Recording the data is when you put all gathered information in clear records which show your findings
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