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Summer Final Part 5
Chapters 34-36 and 2-3
39
Biology
9th Grade
05/25/2011

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Term
5 levels of ecological study from broadest to most specific
Definition
Biosphere, ecosystem, community, population, individual organism
Term
Abiotic factors
Definition
Nonliving physical or chemical condition in an enviroment. Sunlight, water, temperature, soil, wind.
Term
Biotic factors
Definition
Any living part of an enviroment. Prokaryotes, protists, animals, fungi, and plants.
Term
Carrying capacity
Definition
Number of organisms in a population that an enviroment can contain
Term
Exponential growth
Definition
Growth of a population that multiplies by a constant factor at constant time intervals
Term
Density-dependent
Definition
Factor that limits a population more as population density increases. Food and disease
Term
Density-independent
Definition
Factor unrelated to population density that limits a population. Extreme weather
Term
Habitat
Definition
An organism's specific enviroment
Term
Niche
Definition
Unique living arrangement of an organism defined by habitat, food, and time of activity
Term
Interspecific competition
Definition
Competition between species that depend on the same limited resource
Term
Symbiotic relationships
Definition
Parasitism - one gains one loses
Mutalism - both gain
Commensalism - one gains one not affected
Term
Primary and secondary ecological succession
Definition
Primary - a community arises in a life less area
Secondary - A disturbance harms a community but leaves soil intact
Term
What is population density
Definition
Number of individuals of a particular species per unit of area or volume
Term
Limiting factors and how they affect a population
Definition
Condition that restricts a population's growth, such as space, disease, or food availibilty
Term
Energy flow through ecosystems
Definition
Only 10 percent of the energy at a trophic level is passed to the next
Term
Biomass pyramid
Definition
Diagram representing the biomass in each trophic level of an ecosystem
Term
Food chain
Definition
Pathway of food transfer from one trophic level to another
Term
Food web
Definition
Pattern of feeding in an ecosystem consisting of interconnected and branching food chains
Term
Each component of water cycle
Definition
Transpiration, evaporation, condensation, percipitation
Term
Age structure diagram
Definition
Proportion of people in different age groups in a population
Term
Global warming
Definition
Rise in Earth's average temperature
Term
Autotroph
Definition
Organism that makes its own food
Term
Producer
Definition
(Autotroph) and produces organic molecules that serve as food for other organisms
Term
Consumer
Definition
Organism that obtains food by eating producers or other consumers
Term
Heterotroph
Definition
Organism that obtains food by eating other organisms
Term
Trophic levels
Definition
Feeding levels in an ecosystem
Term
Nitrogen fixation
Definition
Process by which certain bacteria convert natural gas to ammonia
Term
Biodiversity
Definition
Variety of life on Earth
Term
Scavengers, decomposers, carnivores, herbivores, and omnivores
Definition
Eats dead things, eat/decompose dead things, eat meat, eat plants, eat both
Term
Ozone depletition is caused by what
Definition
Pollution
Term
Using renewable resources while ensuring they will be there for future usage is called _____
Definition
Conservation biology
Term
The greatest threat to biodiversity today is ______
Definition
Habitat destruction, introduced species, and overexploitation
Term
What does the competitive exclusion principle say
Definition
One species succeding ocer another when the growth of both species is limited by the same resource
Term
What is predation
Definition
Interaction in which one organism consumes another
Term
Innate behavior
Definition
Behavior performed correctly and in the same way by all individuals of a species, without previous experience
Term
Learning
Definition
A change in behavior resulting from experience
Term
Conditioning
Definition
Type of learning in which a particular stimulus or response is linked to a reward or punishment
Term
Imprinting
Definition
A usually irreversible type of learning limited to a specific time period in an animal's
Term
Habituation
Definition
Type of learning in which an animal stops responding to a repeated stimulus that conveys little or no important information
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