Bio ch 1

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Risette
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132057
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Bio ch 1
Updated:
2012-01-31 18:14:09
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Bio chapter an introduction life earth
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Bio ch 1 vocab
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  1. literally "self-feeder"
    autotroph
  2. a particle composed of one or more atoms held together by chemical bonds
    molecule
  3. the change in the base sequence of DNA in a gene
    mutation
  4. in the scientific method, the use of carefully controlled observations or manipulations to test the predictions generated by a hypothesis
    experiment
  5. the portion of an experiment in which all the possible variables are held constant
    control
  6. all the interacting populations within an ecosystem
    community
  7. the broadest category for classifying organisms
    domain
  8. in the scientific method, the decision about the validity of a hypothesis, made on the basis of experiments and observations
    conclusion
  9. a group of (normally similar) cells that carry out a specific function
    tissue
  10. smallest unit of life
    cell
  11. the second broadest taxonomic category
    kingdom
  12. referring to organisms in the domain Eukarya
    eukaryotic
  13. in the scientific method, a statement that identifies a particular aspect of an observation that a scientist wishes to explain
    question
  14. the descent of modern organisms, with modifications, from pre-existing life forms
    evolution
  15. a membrane-enclosed structure found inside a eukaryotic cell that performs a specific function
    organelle
  16. in the scientific method, a statement describing an expected observation or the expected outcome of an experiment
    prediction
  17. all the members of a particular species within an ecosystem, found in the same time and place
    population
  18. the capacity to do work
    energy
  19. in the scientific method, the recognition of and a statement about a specific phenomenon, usually leading to the formation of a question about the phenomenon
    observation
  20. the part of Earth inhabited by living organisms
    biosphere
  21. the unit of heredity
    gene
  22. a molecule that contains carbon and hydrogen
    organic molecule
  23. the smallest particle of an element that retains the properties of that element
    atom
  24. the membrane-bound organelle that contains the cell's genetic material (in eukaryotes)
    nucleus
  25. a general explanation of natural phenomena developed through extensive and reproducible observations; more general and reliable than a hypothesis
    scientific theory
  26. all the organisms and their nonliving environment with a defined area
    ecosystem
  27. a DNA double helix with proteins
    chromosome
  28. referring to the cells of the domain Bacteria and Archaea
    prokaryotic
  29. a substance that can not be broken down, or converted, to simpler substance by ordinary chemical means
    element
  30. liquid portion of the cell
    cytoplasm
  31. the outer membrane of a cell, composed of a bilayer of phospholipids
    plasma membrane
  32. the maintenance of a relatively constant internal environment that is required for the optimal functioning of cells
    homeostasis
  33. the basic unit of taxonomic classification
    species
  34. the diversity of organisms, measured as the variety of different species
    biodiversity
  35. literally "other feeder", not able to make food itself; must eat others
    heterotroph
  36. in the scientific method, a supposition based on previous observations that is offered as an explanation for an observed phenomenon and is used as the observation for future experiments
    hypothesis
  37. a factor in a scientific method that is deliberately manipulated in order to test a hypothesis
    variable
  38. a substance acquired from the environment that is needed for the survival, growth, and development of an organism
    nutrient
  39. scientific theory stating that every living organism is made up of one or more cells
    cell theory
  40. the scientific principle that natural events occur as a result of preceding natural causes
    natural causality
  41. DNA written out "longhand"
    deoxyribonucleic acid
  42. the method of naming organisms by genus and species, often called the scientific name
    binomial system
  43. the process of creating a generalization on many specific observations that support the generalization
    inductive reasoning
  44. another term for "single-celled"
    unicellular
  45. two or more organs that work together to perform a specific function
    organ system
  46. chemical reactions in which the energy of light is used to synthesize high-energy organic molecules, usually carbohydrates, from low-energy inorganic molecules
    photosynthesis
  47. containing more than one cell
    multicellular
  48. the process of generating hypotheses about the results of a specific experiment or the nature of a specific observation
    deductive reasoning
  49. commonly referred to as "survival of the fittest"
    natural selection
  50. a trait that increases the ability of an individual to survive and reproduce
    adaptation
  51. an individual living thing
    organism
  52. a structure composed of two or more distinct tissue types that function together
    organ

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