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17 Cards in this Set
- Front
- Back
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Abiotic factor |
Physical / non-living components of the environment If favourable to an organism, they will live in and reproduce in that environment |
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Biotic factor |
Living features of environment Actions of species impact other organisms sharing that environment |
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Temperature in aquatic environments |
-Constant temp - gradual, small variations in temp -large bodies of water have mostly stable temp -small bodies of water prone to variation -water conducts heat better than air - organisms lose heat rapidly through conduction -organisms with body temp higher than water must have adaptations to maintain body heat |
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Temperature in terrestrial environments |
-fluctuating temperature - great change in short periods of time DUE TO FACTORS SUCH AS: -seasons - depends on earth's tilt on axis -altitude - decreases every 1 degree every 1000m above sea level |
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Factors determining abundance and distribution in terrestrial environments |
temp range water and light availability |
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Factors determining abundance and distribution in marine (saltwater) environments |
Salinity Dissolved gases Tidal movements Wave action |
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Factors determining abundance and distribution in freshwater environments |
Temp variation Dissolved gases pH of water Light availability Water clarity |
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Biotic factors affecting distribution and abundance |
Predator / prey Parasites Competition - availability and abundance of food sources Number of mates Number and variety of disease causing organisms |
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Identify uses of energy by organisms |
-released as heat - needed to maintain body temp (important for endotherms) -needed by the body for reactions - enzymes needed by the body as they are the most efficient at an optimum temp -trigger chemical reactions -used by cells for growth, repair of damaged cells, and active transport of materials across membranes |
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Types of distribution |
Clumped Uniform Random |
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Define photosynthesis |
Chemical process used by chlorophyll-containing cells to convert raw inorganic materials into organic compounds using light energy |
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Process of photosynthesis |
-CO2 taken into the plant through stomata on leaves in gaseous form -Water uptaken through the roots -Leaves in chloroplast-containing chlorophyll absorb sunlight -Converts carbon dioxide and water into glucose and oxygen |
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Importance of photosynthesis to plants |
Organisms need carbohydrates for fuel -ATP comes from the cellular respiration from glucose, which is broken down into carbs Oxygen used in cellular respiration -Breaks down glucose |
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Importance to organisms |
Photosynthesis introduce chemical energy and fixed carbon -> eaten by consumers, allowing them to survive Release of oxygen gas - necessary for anaerobic respiration of other organisms Removal of CO2, builds organic molecules - maintain balance in atmosphere |
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Chemical equation of photosynthesis |
6CO2 + 6H2O -> C6H12O6 + 6O2 |
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Respiration |
Series of chemical reactions that releases energy from complex carbohydrates Takes place in the mitochondria of living cells Glucose broken down in the presence of oxygen, converted to carbon dioxide and water Energy in form of ATP released as heat Glucose converted into starch as storage Converted back when needed |
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Importance to ecosystem |
Use stored chemical energy to provide energy needed to maintain life |
