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30 Cards in this Set
- Front
- Back
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Life's levels of organization
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cells - smallest unit of life
populations - same species in same area communities - all population of all species in a given area ecosystems - community environments biosphere - all regions of earth that have life |
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What 4 subsets of molecules make up life
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nucleic acids, proteins, carbohydrates, lipids
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interdependence between organisms
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producers (plants and some microorganisms) - autotrophs - make own food
consumers (animals) - heterotrophs - depend on energy stored in tissues of producers decomposers (bacteria and fungi) - breaks down remains and waste - recycles nutrients |
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homeostasis
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maintaining an internal environment within a range suitable to sustain life
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scientific names
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two part naming system devised by Carolus Linnaeus - first name is genus (genera) - second name is species
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three domain classification
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Bacteria (prokaryotes)
Archaea (prokaryotes) Eukarya (eukaryotes - includes protists, plants, fungi, and animals) |
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prokaryotes
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Bacteria and Archaea - monera kingdom - single celled, nunucleus or organielle - includes producers, consumers and decomposers
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eukaryotes
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DNA is inside a nucleus
most are larger and more complex than the prokaryotes plants, fungi, animals, protists |
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Eukarya - plants
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all are multicellular, have cell wall made of cellulose, m,ost are photosynthetic prodecers, make up food base for communities
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Eukarya - protists
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most single celled, heterotrophic or autotrophic, eg. amoeba, paramecium, algae
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Eukarya - fungi
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most are multicelled, cell wall but not of cellulose, consumers and decomposers, release chemicals to digest food and absorb nutrients
eg. yeast, mildew, mold, mushrooms |
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Eukarya - animals
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multicelled consumers (herbivores, carnivores, parasites, scavengers), no cell wall, move about during at least some stage of their life
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mutation
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change in DNA
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adaptive trait
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a "good mistake"
a trait that gives the individual an advantage in survival or reproduction |
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natural selection
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"survival of the fittest"
those with favorable traits tend to survive longer, reproduce more, making these traits more common in the population |
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evolution
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changes in a line of dscent over generations
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artificial selection
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breeding for desirable traits
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Biological Theory
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observe phenomenon
develop hypothesis (educated guess) make prodictions devise test of predictions (experiment) carry out test and analyze results |
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scientific theory
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a well supported hypothesis - tested many times and has not been found incorrect
eg. Darwin's theory of evolution by natural selection |
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variable
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specific aspect of an object/event that can differ among individuals or changes over time
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independent variable
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variable
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dependent variable
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variable
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control group
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a standar for comparison
identical to experimental group except for the variable being studied |
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sample error
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nonrepresentative sample skews results
minimize by using large samples |
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metabolism
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all the controlled, enzyme mediated chemical reactions by; which cells get and use the energy
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receptors
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molecules and structure that detect stimuli
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prediction
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a statement of what you will find in the natural world if you were to go looking for it
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models
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theoretical detailed descriptions or analysis that hellps us understand
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mimicry
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look up
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cell
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smallest unit of organization with the capacity to survive and reproduce on its own
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