biology 4.0 / 5 based on 1 rating ? Biologykey wordsGCSEEdexcel Created by: missyraepepperCreated on: 17-02-16 15:07 biodiversity a measure of the totoL number of different species in an area 1 of 37 speciation formation of a new species 2 of 37 alleles different forms of same gene 3 of 37 nucleus it holds all your infomation-DNA 4 of 37 DNA checimal that makes up genes and chromesones 5 of 37 gene a section of DNA that carries the instuctions for a characteristic 6 of 37 chromesones a long thread of a molecule called DNA 7 of 37 homeostasis the way in which the body blances its internal environment- controlled by the hypothalomus in the brain 8 of 37 hypothalamus tells the body if too hot or too cold and tells it too change it back to normal 9 of 37 vasodilation the blood vessels get bigger when too hot 10 of 37 vasoconstriciton when blood vessels get smaller when too cold 11 of 37 osmoregulation controls water content 12 of 37 glucose a simple sugar-absorbs in blood when you eat 13 of 37 insulin hermone and a checimal messanger 14 of 37 phototropism light-growth 15 of 37 hydrotropism water-growth 16 of 37 geotropism gravity-growth= a response to gravity 17 of 37 auxin growth checimal 18 of 37 tropism any response to a stimulus 19 of 37 drug a substance that changes the way the body works 20 of 37 medical drugs limit damages from injuries or diseases 21 of 37 recreational drugs used to make people feel a certain way 22 of 37 tar contains carcinogen=increases risk of cancer in lungs,mouth and throat 23 of 37 carbon monoxide poisnous gas=reduces the amount of oxygen the red blood cells can carry 24 of 37 nicotine addictive drug in tobacco 25 of 37 microorganism a very small single cell such as bacteria,fungi and viruses 26 of 37 pathogen a microorganism which causes disease 27 of 37 infectious disease a disease which is passed from person to person 28 of 37 immune system the bodys defence mechanism against disease 29 of 37 toxin poison 30 of 37 antiseptic checimals that destroy pathogens before they enter the body 31 of 37 antibiotics capable of killing bacteria and some fungi 32 of 37 antifungals kill fungal infections 33 of 37 mrsa strain of a commom bacterium 34 of 37 interdendence organisms rely on eachother for their food 35 of 37 biomass stored energy in the tissue of living things 36 of 37 parasite feeds on nutrients from the host, but doesnt kill them 37 of 37
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