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20 Cards in this Set
- Front
- Back
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List the characteristics of living things
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they feed,grow,respire,reproduce,move and excrete
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what is ecology
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this is the study of living organisms and how they interact with each other and their environment
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what is a population
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this is a group of organisms of the same species living together in a particular habitat
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give two examples of an ecosystem, other than a pond
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forest and desert
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what is a niche
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the job of an organism within an ecosystem eg. earthworms increase soil fertility
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what is a species
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this is a group of similar organism that is able to interbreed
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what is a dichotomous key
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This is a way to identify organisms
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why are green plants called primary producers
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because they produce their own food
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energy flow in an ecosystem is
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unidirectional
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trophic levels are formed by
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organisms in a food chain
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who has the greatest biomass in a pyramid of biomass
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the greatest total biomass is in the producer
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in a pyramid of numbers
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the organisms at the top are usually bigger and less numerous than those at the bottom
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what are abiotic factors
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these are physical or non-living factors
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what are biotic factors
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other living organisms
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what is symbiosis
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symbiosis is any close relationship between two different species of living organisms
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predator/prey relationships
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predators
a predator stalks and kills other animals, its prey for food. predators are adapted to kill their prey: they have highly developed senses they have sharp piercing teeth they move rapidly prey preys are adapted to protect themselves against predation: they have sharp senses they have rapid responses they often camouflage themselves |
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what is parasitism
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this is where one organism the parasite benefits and the other partner the host is harmed
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commensalism:
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this is where one partner the commensal benefits and the other neither gains nor is harmed
eg. remora and shark the remora attaches itself to sharks by a suction cup on its head, gains food scraps left by the shark |
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mutualism:
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this is where both organisms benefit
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pathogen/host
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a pathogen is a parasite which causes disease of its hosts
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