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Ecology Thingy

Polina Coleman avatar Polina Coleman
25 July 2022
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15 test answers

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question
Transitions between biomes do not have to be sharp and sudden, which means that different biomes can share characteristics.
answer
t
question
Which of the following represents change to an ecosystem brought about by abiotic factors? a. the decrease in plant populations due to a decrease in the available water supply b. the increase in a predator population due to the increase in prey population c. the decrease in plant species due to herd grazing d. the extinction of a plant species due to bacterial infection
answer
A
question
What types of organisms will be affected by a decreased supply of water in an ecosystem? a. Producers, consumers, and decomposers will be affected. b. Producers and consumers will be affected. c. Consumers and decomposers will be affected. d. No organisms will be affected.
answer
A
question
t is advantageous for a predator to prey exclusively on a single prey species.
answer
f
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A quaternary consumer species would be expected to have a smaller population than a secondary consumer species.
answer
t
question
While trees are not the largest level in the pyramid of numbers, they are still the base for both the pyramids of biomass and pyramids of energy.
answer
t
question
Which of the following is most likely to be a limiting factor for growth on the floor of a tropical rainforest? a. water b. shelter c. sunlight d. prey
answer
c
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Explain why quaternary consumers occupy the top position in the pyramid of energy.
answer
Energy is lost ascending each trophic level of the pyramid of energy. Therefore, when quaternary consumers eat tertiary consumers, most of the energy stored in the tertiary consumers' bodies is lost and only 10-15% is passed on to the quaternary consumers. Quaternary consumers, meanwhile, occupy the top position in the pyramid of energy because nothing preys upon them in turn.
question
The prey of one species might also be the predator of another species.
answer
t
question
Quaternary consumers are not _______. a. consumers b. prey c. predators d. animals
answer
b
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Tundra is known for its _______. a. sparse precipitation and extreme cold temperatures b. sparse precipitation and mild winters c. coniferous forests d. heavy rainfall and extreme cold temperatures
answer
a
question
Greater temperature fluctuations occur _______. a. in terrestrial ecosystems b. in marine ecosystems c. in river ecosystems d. in lake ecosystems
answer
a
question
How does biodiversity affect the stability of an ecosystem?
answer
Having a number of different organisms increases the stability of an ecosystem, because a change in the population of one organism will have less effect on the population of an organism that depends on it. In a biodiverse ecosystem, a consumer will have a larger pool of food resources to draw from. If one of those food resources is decreased, the consumer can adjust by eating more of the other types available
question
Justify why the predator/prey relationship is a community level interaction
answer
The predator/prey relationship is an interaction between two different species, so the organism, species and population levels are too low. The ecosystem and higher levels of organization deal with the interaction between biotic and abiotic factors, especially climate, but predation is a wholly biotic activity. The community level, meanwhile, specifically deals with interactions between members of different species
question
How do limiting factors determine the carrying capacity of an ecosystem?
answer
An ecosystem can support a certain number of organisms depending on the availability of food, shelter, and water. If an ecosystem has more organisms than its water supply can support then it is beyond its carrying capacity. The ecosystem will not be able to support the organisms and they will have to either relocate or die until the ecosystem is once again at or below carrying capacity.