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Chapter 1- Populations and Communities Science Test
Terms in this set (43)
What do organisms obtain from their environment?
Food, water, shelter and other things it needs to live, grow, and reproduce.
What does an organism interact with in its environment?
Living and non-living parts
List the levels of organization
organism, species, populations, community, ecosystem.
What are the four ways of determining population size?
Direct observation, indirect observation, sampling, mark-and-recapture.
Population Density Formula
Population Density= number of individuals/ area
What are the four limiting factors?
food, water, space, weather.
What are the 3 main interactions among organisms?
Competition, Predatation ,Symbiosis
What is a symbiosis relationship?
A relationship between two organisms where at least one organism benefits.
What are the 3 types of symbiosis relationships?
Mutualism, Commensalism, Parasitism
Mutualism- both organisms benefit.
Commensalism- one organism benefits while the other one is unaffected.
Parasitism- one organism benefits while the other one is harmed.
What is succession?
A series of of events that bring life back in an area.
Unlike primary succession, when does secondary succession occur?
Secondary succession, unlike primary succession, occurs in a place where an ecosystem already exists.
A series of changes that occur in area where no soil or organisms exist.
A series of changes that occur in an area where the ecosystem has been disturbed but where soil and organisms still exist.
A living thing.
An environment that provides the things an organism needs to live, grow, and reproduce.
Living part of an organism's habitat.
Non-living part of an organism's habitat.
Process where an organism uses water, carbon dioxide, and sunlight to create their own food.
a group of organisms that are physically similar and can mate and reproduce with each other to produce offspring that can also mate and reproduce.
All the members of one species in a particular area.
All the different populations that live together in an area.
The community of organisms that live in a particular area along with their non-living surroundings.
The study of how living things interacts with each other and with their environment.
An approximate of a number based on reasonable assumptions.
The number of births in a population in a certain amount of time.
The number of deaths in a population in a certain amount of time.
Leaving a population.
Entering a population.
An environmental factor that causes a population to decrease.
The largest population an environment can support.
Developed the theory of evolution after traveling on the HMS Beagle to the Galapagos Islands and studying and observing a variety of fossils and animals.
A process where a characteristic that makes an individual better suited to its environment may eventually become common in that species.
A behavioral or physical characteristic of an organism that allows it to be successful in its environment.
The role of an organism to live successfully in their environment.
The struggles between organisms to survive as they attempt to use the same limited resources.
An interaction in which one organism kills another for a source of food.
Organism that kills.
Organism that is being killed.
Organism that lives on/inside of another.
The organism that the parasite lives on.
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