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Biology 1108 Questions with Answers (100% Correct
Answers)
Population Answer: All of the individuals of a SINGLE SPECIES that
interact.
Community Answer: All of the populations of LIVING things that interact
in a PLACE.
Ecosystem Answer: A biological community of interacting organisms and
their physical environment. Includes biotic and abiotic components.
Answer: What are at least 6 things you can measure that we can use to
help define an ecosystem? Use at least 2 biotic and 2 abiotic factors, and
be specific. Answer: 1. Average seasonal rainfall
2. Average seasonal temperature
3. Soil conditions
4. Biodiversity
5. Species interaction, for example, what is the predation of one species
on the other?
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6. Are there any invasive species that compete for resources?
Name some of the environmental (ABIOTIC) factors that define an
ecosystem? Answer: 1. Climate-averages and seasonality. For example,
rainy seasons.
2. Geology-bedrock, water, soils, topography.
3. Disturbance-Natural (tornado), human, and the scale and frequency of
such disturbances.
Name some of the environmental (BIOTIC) factors that define an
ecosystem? Answer: 1. Biodiversity-what kinds of organisms live there and
in what proportion.
2. Biomass-for example, plants, wood, waste.
3. Species interactions-how the different species interact with one
another.
4. Invasive or keystone species.
What is an invasive species? Answer: An organism that is not native to a
particular area. An invasive species is capable of causing extinctions of
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native plants and animals, reducing biodiversity, competing with native
organisms for limited resources, or altering habitats.
Is there any defined size for an ecosystem? Answer: No, there are no
boundaries, mostly.
Mount St. Helens Answer: Located in Washington State and part of the
Cascade Mountains. It is a part of the temperate rainforest biome.
What happens to a biome as the elevation increases? Answer: At sea
level, there is tropical rainforest, and as we go up in elevation, there is
temperate forest, then taiga, then tundra, then polar ice at the top of the
mountain.
Answer: What type of biome did Mt. St. Helen have prior to the volcanic
eruption? Answer: Old growth forest, rich soil.
*Predict how biotic and abiotic conditions change with elevation and
latitude. Answer: There is a gradual decrease in temperature with
increasing altitude and latitude. As you go north, there will be a gradual
change in plant communities. Humidity will also decrease as latitude and
altitude increase. The soil becomes drier, often frozen in the winter. As
you would expect, the plants and animals that can survive in such
conditions are likely fewer, so the biodiversity is also likely not as diverse.
© 2025 All rights reserved
Biology 1108 Questions with Answers (100% Correct
Answers)
Population Answer: All of the individuals of a SINGLE SPECIES that
interact.
Community Answer: All of the populations of LIVING things that interact
in a PLACE.
Ecosystem Answer: A biological community of interacting organisms and
their physical environment. Includes biotic and abiotic components.
Answer: What are at least 6 things you can measure that we can use to
help define an ecosystem? Use at least 2 biotic and 2 abiotic factors, and
be specific. Answer: 1. Average seasonal rainfall
2. Average seasonal temperature
3. Soil conditions
4. Biodiversity
5. Species interaction, for example, what is the predation of one species
on the other?
© 2025 All rights reserved
,2
6. Are there any invasive species that compete for resources?
Name some of the environmental (ABIOTIC) factors that define an
ecosystem? Answer: 1. Climate-averages and seasonality. For example,
rainy seasons.
2. Geology-bedrock, water, soils, topography.
3. Disturbance-Natural (tornado), human, and the scale and frequency of
such disturbances.
Name some of the environmental (BIOTIC) factors that define an
ecosystem? Answer: 1. Biodiversity-what kinds of organisms live there and
in what proportion.
2. Biomass-for example, plants, wood, waste.
3. Species interactions-how the different species interact with one
another.
4. Invasive or keystone species.
What is an invasive species? Answer: An organism that is not native to a
particular area. An invasive species is capable of causing extinctions of
© 2025 All rights reserved
, 3
native plants and animals, reducing biodiversity, competing with native
organisms for limited resources, or altering habitats.
Is there any defined size for an ecosystem? Answer: No, there are no
boundaries, mostly.
Mount St. Helens Answer: Located in Washington State and part of the
Cascade Mountains. It is a part of the temperate rainforest biome.
What happens to a biome as the elevation increases? Answer: At sea
level, there is tropical rainforest, and as we go up in elevation, there is
temperate forest, then taiga, then tundra, then polar ice at the top of the
mountain.
Answer: What type of biome did Mt. St. Helen have prior to the volcanic
eruption? Answer: Old growth forest, rich soil.
*Predict how biotic and abiotic conditions change with elevation and
latitude. Answer: There is a gradual decrease in temperature with
increasing altitude and latitude. As you go north, there will be a gradual
change in plant communities. Humidity will also decrease as latitude and
altitude increase. The soil becomes drier, often frozen in the winter. As
you would expect, the plants and animals that can survive in such
conditions are likely fewer, so the biodiversity is also likely not as diverse.
© 2025 All rights reserved
