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Biology U4 Test

QuestionAnswer
can be produced or replaced (wind, solar) renewable resources
can't be replenished in a reasonable amount of time (oil-fossil fuels non-renewable resources
variety of species in an area biodiversity
when a species disappears extinction
low numbers of a species, could be extinct endangered species
species is likely to be endangered threatened species
destroyed due to human actions habitat loss
What are some examples of habitat loss? deforestation and polluting the coral reef
protecting biodiversity conservation
What is an example of a law of conservation? Endangered Species Act of 1973
Nitrogen runoff from what causes algal blooms because plants love nitrogen/ kills fish (dead zone) fertilizer
How are wetlands destroyed? oil ships create channels
measurement of the number of individuals living in a defined space population density
FIND POPULATION DENSITY!!
how a population is spread in an area population dispersion
individuals gather into groups where resources are available clumped population
same species must compete for limited resources and territory uniform population
resources evenly distributed random population
What is an example of a clumped population? school of fish
What is an example of a uniform population? nesting penguins being territorial over eggs
What is an example of a random population? sloth in tropical forests-no competition and few predators
What affects population growth? births, deaths, migration
population size increases dramatically over a relatively short time exponential growth
What does exponential growth have? available resources and space
population begins with a period of slow growth followed by a period of exponential growth before leveling off at a state size logistic growth
What happens during logistic growth? resources are reduced and growth slows down
competition, disease, over crowding density dependent
natural disasters density independent
amount of organisms an ecosystem can support carrying capacity
stable community climax community
CARRYING CAPACITY LEADS TO CLIMAX COMMUNITY!!
What is an example of a climax community? a pond with the ideal amount of fish, space, and resources
What happens if carrying capacity is exceeded? nature usually corrects itself with organisms dying because of lack of resources
What is succession? change
What is primary succession? completely destroyed
What is an example of primary succession? ice age, mass volcanoes
What is secondary succession? partly destroyed and can come back relatively soon
What is an example of secondary succession? flood, fire
the 1st species to occupy an area (usually producers) pioneer species
a specific place or role for an organism in an ecosystem niche
Can two species share the same niche in the same habitat? no
causes species to divide resources competition
organism feeds on another predation
a species that can change an ecosystem dramatically keystone species
when organisms from a relationship symbiosis
both species benefit mutualism
one benefits other is not harmed or helped commensalism
one benefits, one is harmed parasitism
What is an example of mutualism? deer and birds on backs, bee/ flower
What is an example of commensalism? clownfish and sea anemone, whale/ barnacle
What is an example of parasitism? tapeworms and humans
STUDY WORKSHEETS!!!
Created by: colorguard101
 

 



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