Important Terms
What is population?
the nonliving organisms in an ecosystem.
what is Abiotic Factors
order of events in an ecosystem, where one living organism eats another organism, and later that organism is consumed by another larger organism
Food Chain
which of the following would be considered a limiting resource for a population?
A. shelter B. water
C. food D. all of the above
D. all of the above
what is the first trophic level called
Producers
A. shelter
B. space
C. food
D. all of these
D. all of these
Which of the following is an example of a consumer?
a. grass b. squirrels c. mushrooms
B. squirrels
Define the following term.
Food Chain
A direct line of how energy is transferred.
True/False : population of organisms grows linearly
False
how many trophic levels are on the energy pyramid ?
when is passed in an ecosystem from one level trophic to the next , ONLY 10 percent of the energy is passed on.
10 percent rule
the living organisms in an ecosystem.
What is Biotic Factors
Which organisms are classified as consumers?
A. oak tree, squirrel and snake
B. snake and owl only
C. oak tree and snake only
D. squirrel, snake, and owl
D. squirrel, snake, and owl
how do population grow?
A. linearly B. exponentially
C. S-curve C. circularly
B. exponentially
which trophic level would deer, sheep, and cows be represented ?
Trophic level 2 or Consumers
define the term :
Commensalism
one species benefit from the relationship. neither is harmed
_______________ factors (living things) usually interact with _______________ factors (non-living things) in an ecosystem.
A. biotic; abiotic
B. abiotic; biotic
C. dead; growing
D. small; large
A. Biotic ; Abiotic
A commercial fishing company moves into the ecosystem shown in the food web below and begins to use nets to catch crustaceans. The crustaceans are taken out of the water and sold as food.
How will this most likely affect the species in this ecosystem?
A. There will be a decrease in the number of crustaceans which will cause a decrease in the fish population.
B. There will be an increase in the number of crustaceans which will cause a decrease in the algae population.
C. There will be an increase in the number of crustaceans which will cause a decrease in the shark population.
D. There will be a decrease in the number of crustaceans which will cause an increase in the dolphin population
A. There will be a decrease in the number of crustaceans which will cause a decrease in the fish population.
what is the difference between population and community?
population- group of animals living in an area at the same time.
community- all of the population living in an ecosystem at the same time.
what is the main source of energy?
A. Heat B. sun
C. chocolate . D. none of these
B. Sun
a close, longterm relationship between two species that usually involves an exchange of food or energy.
what is Symbiosis
Which of these best identifies biotic factors in a forest environment?
A. plants, animals, and their surroundings; including wildflowers, birds, rocks, and water
B. the features of the habitat and decaying material; including soil, air, dead trees, and bacteria
C. the things living plants and animals need; including air, water, soil, and nutrients
D. producers, consumers, and decomposers; including wildflowers, deer, songbirds, and mushrooms
D. Producers, consumers, and decomposers; including wildflowers, deer, songbirds, and mushrooms.
Which food chain is correct?
A population of black bears depends on salmon from a stream for food.
If a drought causes the stream to run dry one year, how will this likely impact the black bear population?
A. The population's size will increase.
B. The population will thrive on new species of fish.
C. The population's size will decrease.
D. The population will be unaffected.
C. the population's size will decrease.
The tertiary consumers gains how much energy?
A 100% B. .1%
C. 5% D. 15%
B .1%