AQA A2 Biology: Unit 4 crossword 4.5 / 5 based on 6 ratings ? BiologyUnit 4A2/A-levelAQA Created by: rioashcroftCreated on: 25-11-15 12:07 The stage of photosynthesis where ADP, NADP and Glucose are formed. calvin cycle 1 of 22 The role of an organism within it's comunity niche 2 of 22 The production of ATP without the use of oxygen. In animals, lactate is formed. In plants and yeast, ethanol is formed. anaerobic respiration 3 of 22 A change in an ecosystem, overtime, of the species that occupy it due to a change in abiotic factors succession 4 of 22 A species that can colonise bare rock or ground. pioneer 5 of 22 A square piece of equipment that can be used to estimate population density and frequency quadrat 6 of 22 succession that occurs when soil is already present, for example after a forest fire. secondary succession 7 of 22 A pyramid that is ALWAYS pyramid shaped. pyramid of energy 8 of 22 The number of individuals of one species. population 9 of 22 The first stage of respiration glycolysis 10 of 22 This will be low in a hostile environment. biodiversity 11 of 22 The process of converting ammonium compounds into nitrates, then nitrites. nitrification 12 of 22 A pyramid that shows the number of individuals in each trophic level pyramid of numbers 13 of 22 adenosine triphosphate ATP 14 of 22 The effect of fertilisers running into aquatic ecosystems, often with devastating effects. Eutrophication 15 of 22 In anaerobic respiration, this substance accepts the Hydrogen to form lactic acid. Pyruvate 16 of 22 A build up of waste from pesticides, which travels along the food chain and is harmful to predators at the top. bioaccumulation 17 of 22 The process that converts fossil fuels back into atmospheric CO2. combustion 18 of 22 A method of using either a pathogen, predator or parasite to control a pest. biological control 19 of 22 When both organisms benefit from a relationship between them, it's called a __________ relationship. symbiotic 20 of 22 The final electron acceptor of respiration oxygen 21 of 22 The act of splitting water using light. photolysis 22 of 22
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