Organisms and Energy 0.0 / 5 ? BiologyEnergy flow through ecosystemsGCSEEdexcel Created by: TillyGarfootCreated on: 30-03-19 17:25 Prokaryotic cell Smaller, simpler cells eg bacteria 1 of 24 Eukaryotic cell Complex cells which include all plant and animal cells 2 of 24 Aerobic Respiration The chemical reactions that break down nutrient molecules in living cells to release energy 3 of 24 Aerobic Respiration equation Glucose + Oxygen = Carbon dioxide + water vapour 4 of 24 Nucleus Contains genetic material 5 of 24 Cytoplasm Where many chemical reactions take place 6 of 24 Mitachondria Where respiration happen 7 of 24 Anaerobic respiration Releasing energy from glucose without oxygen 8 of 24 Anaerobic respiration equation (yeast) Glucose = carbon dioxide + ethanol (+ some energy) 9 of 24 Anaerobic respiration equation (muscle cells) Glucose = lactic acid (+ some energy) 10 of 24 Surface to volume ratio As the size of the organisms increases the SA:V ratio gets smaller 11 of 24 Rate of diffusion Surface area x concentration gradient / thickness of membrane 12 of 24 Chloroplasts Absorb light energy in photosynthesis 13 of 24 Photosynthesis An endothermic reaction which takes in CO2 and water and releases glucose and oxygen 14 of 24 Photosynthesis equation Carbon dioxide + water = glucose + oxygen 15 of 24 Osmosis When the water particles in a high solute concentration move across a partially permeable membrane to a lower solute concentration 16 of 24 Active transport The movement of particles from a low concentration to a higher concentration using energy from cellular respiration 17 of 24 Xylem Transport water and dissolved minerals in one direction only - roots to shoots 18 of 24 Phloem Transports sucrose and amino acids up and down the stem to growing and storage tissues 19 of 24 Transpiration Loss of water from stomata, affected by wind speed, humidity, temperature and light intensity 20 of 24 Guard cells Control the opening and closing of the stoma 21 of 24 Rate of transpiration Distance moved by the air bubble / time taken to move that distance 22 of 24 Potometer Measures a plant’s rate of transpiration using its rate of water uptake as an equivalent 23 of 24 Xerophyte A species of plant that has adapted to survive in an environment with little water 24 of 24
WJEC GCSE Biology Unit 1.6 - Ecosystems, Nutrient Cycles & Human Impact on the Environment Revision 0.0 / 5
Comments
No comments have yet been made