Honors Biology- Ecology Test with Questions
and correct Answers
What is symbiosis? - ✔✔relationship between two or more organisms
Name the types of symbiosis - ✔✔commensalism, mutualism, parasitism
Define the three types of symbiosis - ✔✔mutualism- both organisms benefit
ex: bird eats ticks from cow
commensalism- one benefits and other is unaffected
ex: bug carried with you or a remora and shark
parasitism- one benefits other is harmed
ex: ticks to fish
Define ecological succession - ✔✔changes due to natural disasters or human interaction
and older organisms are weeded out and new organisms move in
Compare and contrast primary and secondary succession include the pioneer species -
✔✔Primary-soil isn't present due to volcanic eruptions or melting ice sheath; pioneer:
linchens and mosses
Secondary- soil is present and community is cleared due to forest fires or the clearing of
farm land; pioneer: grasses and shrubs
What main criteria influence population growth rate? Distinguish between immigration and
emigration. - ✔✔Population growth ( growth depends on individuals who enter or exit
the population) influences density rates
Birth and Death/ Immigration and Emigration
Under what conditions does exponential growth occur? - ✔✔Takes place under ideal
conditions Ex: humans, invasive species, protected species
What happens during logistic growth? (Include definition of carrying capacity) -
✔✔Growth has slowed or stopped and it reaches carrying capacity (maximum number of
individuals in an area)
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