The survival of organisms who have best adapted to their environment.
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DEFINE: Selection Pressures
Selection pressures effect natural selection such as; disease, predation, competition and abiotic environmental conditions.
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DEFINE: A Species
A group of organisms sharing common anatomical and physiological characteristics and the same genes.
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DEFINE: A Mutation
A sudden random change int he number or structure of chromosomes (DNA).
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DEFINE: Abiotic Factor and give examples
Non-living or physical factors which affect organisms. Examples: Light, moisture, temperature, wind speed, oxygen availability.
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DEFINE: Biotic Factor and give examples
Factors relating to living things. Examples: Competition, disease, predation, grazing.
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DEFINE: Producer, Consumer and Decomposer
Producer=Plant that produces their own food (photosynthesis) at he start of a food chain. Consumer=Organisms that eat other organisms (the producer). Decomposer=Organism that breaks down cells of dead plants and animals.
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DEFINE: Biological Control and give an example
The control of a pest by the introduction of a natural predator. Example: The release of parasitic wasps to control aphids.
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DEFINE: Pesiticides
Substance to destroy harmful insects and organisms to cultivated plants.
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DEFINE: Bioaccumulation and give an example
When toxins build up in a food chain. Example: The use of DDT as insecticide in the 50s and 60s resulting in the eggshells of birds of prey being thin and easily broken.
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DEFINE: Monoculture
The cultivation of a single crop in a given area.
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DEFINE: Indicator Species
An organism whose presence or absence give information about environmental conditions.
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DEFINE: Community
All the living things in an ecosystem.
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DEFINE: Biome
Various regions of our planet.All the living things in an ecosystem.
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DEFINE: Niche
The role an organism plays within a community.
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DEFINE: Biodiversity
The number and abundance of species in an ecosystem.
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Other cards in this set
Card 2
Front
Selection pressures effect natural selection such as; disease, predation, competition and abiotic environmental conditions.
Back
DEFINE: Selection Pressures
Card 3
Front
A group of organisms sharing common anatomical and physiological characteristics and the same genes.
Back
Card 4
Front
A sudden random change int he number or structure of chromosomes (DNA).
Back
Card 5
Front
Non-living or physical factors which affect organisms. Examples: Light, moisture, temperature, wind speed, oxygen availability.
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