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Keywords

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  1. 1Movementan action by an organism or part of an organism causing a change of position or place
  2. 2Respirationchemical reactions in cells that break down nutrient molecule & release energy for metabolism
  3. 3Sensitivitythe ability to detect or sense stimluli in the internal or external environment and to make appropriate responses
  4. 4Excretionremocal from organisms of the waste products of metabolism, toxic materials and substances in excess of requirements
  5. 5Speciesa group of organisms that can reproduce to produce fertile offspring
  6. 6tissuea group of cells with similar structures, working together to perform a shared function
  7. 7organa structure made up of a group of tissues, working together to perform specific functions
  8. 8organ systema group of organs with related functions, working together to perform body functions
  9. 9diffusionthe net movement of particles from a region of their higher concentration to a region of their lower concentration down a concentration gradient, as a result of their random movement
  10. 10osmosisthe net movement of water molecules from a region of higher water potential to a region of lower water potential, through a partially permeable membrane
  11. 11active transportthe movement of particles through a cell membrane from a region of lower concentration to a region of higher concentration using energy from respiration
  12. 12catalysta substance that increases the rate of a chemical reaction and is not changed by the reaction
  13. 13enzymesproteins that function as biological catalysts
  14. 14photosynthesisthe process by which plants manufacture carbohydrates from raw materials using energy from light
  15. 15limiting factorsomething present in the environment in such short supply that it restricts life processes
  16. 16ingestionthe taking of substances e.g food and drink into the body through the mouth
  17. 17Mechanical digestionthe breakdown of food into smaller without chemical change to the food molecules
  18. 18Chemical Digestionthe breakdown of of large insoluble molecules into small soluble molecules
  19. 19absorptionthe movement of small food molecules and ions through the wall of the intestine into the blood
  20. 20assimilationthe movement of digested food molecules into the cells of the body where they are used, becoming part of the cells
  21. 21egestionthe passing out of food that has not been digested or absorbed, as faeces, through the anus
  22. 22transpirationloss of water vapour from plant leaves by evaporation of water at the surfaces of the mesophyll cells followed by the diffusion of water through the stomata
  23. 23translocationthe movement of sucrose and amino acids in the phloem from regions of production or regions of storage to regions where they are used in respiration or growth
  24. 24pathogena disease causing organism
  25. 25transmissible diseasea disease in which the pathogen can be passed from one host to another
  26. 26active immunitydefence against a pathogen by antibody production in the body
  27. 27passive immunityshort-term defence against a pathogen by antibodies acquired from another individual e.g. mother to infant
  28. 28aerobic respirationthe chemical reactions in cells that use oxygen to break down nutrient molecules to release energy
  29. 29anaerobic respirationthe chemical reactions in cells that break down nutrient molecules to release energy without using oxygen
  30. 30deaminationthe removal of the nitrogen-containing part of amino acids to form urea
  31. 31synapsea junction between 2 neurones
  32. 32sense organsgroups of receptor cells responding to specific stimuli: light, sound, touch, temperature and chemicals
  33. 33hormonea chemical substance, produced by a gland and carried by the blood which alters the activity of one or more target organs
  34. 34Homeostasisthe maintenance of a constant internal environment
  35. 35gravitropsim/geotropisma response in which parts of a plant grow towards or away from gravity
  36. 36Phototropisma response in which parts of a plant grow towards or away from the direction from which light is coming
  37. 37Drugany substance taken into the body that modifies or affects chemical reactions in the body
  38. 38asexual reproductiona process resulting in the production of genetically identical offspring from one parent
  39. 39sexual reproductiona process involving the fusion of 2 nuclei of 2 gametes to form a zygote and the production of that are genetically different from each other
  40. 40fertilisationthe fusion of the gamete nuclei
  41. 41pollinationthe transfer of the pollen grains from the anther to the stigma
  42. 42self-pollinationthe transfer of pollen grains from the anther of a flower to the stigma of the same flower or different flower on the same plant
  43. 43cross-pollinationthe transfer of pollen grains from the anther of a flower to the stigma of different flower of the same species
  44. 44sexually transmitted infectionAn infection that is transmitted via bodily fluids through sexual contact
  45. 45inheritancethe transmission of genetic information from generation to generation
  46. 46chromosomea thread-like structure of DNA, carrying genetic information in the form of genes
  47. 47genea length of DNA that codes for a protein
  48. 48allelea version of a gene
  49. 49haploid nucleusa nucleus containing a single set of unpaired chromosomes, e.g. in gametes
  50. 50diploid nucleusa nucleus containing two sets of chromosomes, e.g. in body cells
  51. 51mitosisnuclear division giving rise to genetically identical cells
  52. 52meiosisreduction division in which the chromosome number is halved from diploid to haploid resulting in genetically different cells
  53. 53genotypethe genetic make-up of an organism in terms of the alleles present
  54. 54phenotypethe observable features of an organism
  55. 55homozygoushaving two identical alleles of a particular gene
  56. 56heterozygoushaving two different alleles of a particular gene
  57. 57dominantan allele that is expressed if it is present
  58. 58recessivean allele that is only expressed when there is no dominant allele of the gene present
  59. 59sex-linked characteristica characteristic in which the gene responsible is located on a sex chromosome and that this makes it more common in one sex than in the other
  60. 60variationdifferences between individuals of the same species
  61. 61mutationgenetic change
  62. 62gene mutationa change in the base sequence of DNA
  63. 63adaptive featurethe inherited functional features of an organism that increase its fitness
  64. 64fitnessthe probability of an organism surviving and reproducing in the environment in which it is found
  65. 65process of adaptionthe process, resulting from natural selection, by which populations become more suited to their environment over many generations
  66. 66food chainshowing the transfer of energy from one organism to the next, beginning with a produce
  67. 67trophic levelthe position of an organism in a food chain, food web, pyramid of numbers or pyramid of biomass
  68. 68food weba network of interconnected food chains
  69. 69produceran organism that makes its own organic nutrients, usually using energy from sunlight, through photosynthesis
  70. 70consumeran organism that gets its energy by feeding on other organisms
  71. 71herbivorean animal that gets its energy by eating plants
  72. 72carnivorean animal that gets its energy by eating other animals
  73. 73decomposeran organism that gets energy from dead or waste organic material
  74. 74populationa group of organism of one species, living in the same area, at the same time
  75. 75communityall of the populations of different species in an ecosystem
  76. 76ecosystema unit containing the community of organisms and their environment, interacting together e.g. decomposing log or a lake
  77. 77genetic engineeringchanging the genetic material of an organism by removing, changing or inserting individual genes
  78. 78sustainable resourceone which is produced as rapidly as it is removed from the environment so that it does not run out
  79. 79sustainable developmentdevelopment providing for the needs of an increasing human population without harming the environment

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El usuario ha eliminado su información de asignaturas Fichas sobre Keywords, creado por Usuario eliminado el 15/09/2016.
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Usuario eliminado · sep 2016
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16 sep 2016
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  • Creado por Leann McLeod · 31 mar 2016
  • Copiado por Leann McLeod · 15 sep 2016
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