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30 Cards in this Set
- Front
- Back
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The weakest symbiotic attachment, in which one species simply lives better in the presence of another species
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commensalism
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The DNA molecule is most similar functionally to
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a computer chip
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A class project designed to study a pond ecosystem would make careful records of
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animals and plant life, abiotic factors plus baceria, fungi, and protests
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To be part of the biosphere, any particular region must
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support life
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What are some characteristics of parasites
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-They are specialists and usually are able to affect only one variety of host
-Some reside inside their hosts, whereas others live outside their hosts -Their host may be a plant as well as an animal |
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A new life cycle begins with
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fertilization of an egg
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To a person studying utilization of classroom space on campus, the most useful data concerning students in a classroom would be expressed by the number of
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individuals per square yard
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At how many degrees nother and south of the equator does air rise as a result of differential heating and cooling?
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60 degrees
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A relationship in which twwo species are dependent on each other for survival is
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mutualism
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what does not depend directly on sunlight for energy
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comsumers and decomposers
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Seasonal bird migration could be sited as an example of
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distribution over time
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What portion of the Earth's surface is covered by oceans?
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approximately 70%
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Niche overlap initially leads to
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competition
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In theexample in the text, the change in moth populations from predominately white and black winged forms was the resut of
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-environmental change
-natural selection -food choices by predators -the ability of birds to find the prey |
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The portion of the biosphere that is composed entirely of water is the
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hydrosphere
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A process found only in plants and some bacteria
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photosynthesis
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An example of commensalism
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Robins and human populations
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The capacity to acquire, store, and use energy
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Metabolism
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How individuals are distributed at each age level for a population
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Age structure
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An example of Mimicry
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Repugnant species resemble tasty ones
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J-shaped curve
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Describes a population that experiences unrestrained growth
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a large region characterized by its large array of dominant primary producers
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Biome
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Decomposers perform their recycling efforts on organisms
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on everything
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Biological magnification refers to
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accumulation of toxic pollutants as animals pass through a food chain
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Net primary productivity is
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the amount of energy stored in plant tissue in excess of that used by autotrophs in respiration
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The biomass of a community is the weight of
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the living organisms
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The pyramid of energy
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is a result of the decline in the energy available as energy travels through the trophic levels
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Nucleosome
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A portion of a DNA molecule wound around a spool of histone protein is called this
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Fragmentation and disappearance of nuclear envelop and nucleolus occurs in what
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mitosis
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This alters the composition of chromosomes and results in new combinations of alleles
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Crossing over
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