AnswersFL-2001340-Environmental Science BHuman Impact on the Environment

Human Impact on the Environment — Cumulative exam Answers

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Review the picture below.Which would be the most accurate title for this picture?

Question illustration
A
primary succession after a controlled fire
B
primary succession after a volcanic eruption
C
secondary succession after a controlled fire
D
secondary succession after a volcanic eruption
22
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The Serengeti plains are part of the African savanna ecosystem and are home to a variety of different species of plants and animals. The Serengeti plains experience a seven-month period of seasonal drought each year, during which the ecosystem receives only four inches of rain and the availability of some resources becomes very scarce. Which type of limiting factors does the seasonal drought in the Serengeti plains affect?

A
density-independent factors
B
density-dependent factors
C
population-dependent factors
D
population-independent factors
23

Which human activity is correctly paired with the greenhouse gas that it increases?

A
rice cultivation and water vapor
B
landfilling and carbon dioxide
C
deforestation and methane
D
sewage treatment and nitrous oxide
24

Scientists use specific levels of organization to analyze the biosphere. The Everglades consist of a large area of subtropical wetlands in Florida. Various species of plants and animals can be found in the Everglades, including panthers, cypress trees, herons, and alligators.The group of ecosystems on Earth that feature climate, vegetation, and wildlife similar to the Everglades is

Question illustration
A
a biosphere.
B
a community.
C
a population.
D
a biome.
25

What is the difference between food chains and food webs?

A
Food webs show the flow of energy from producers to consumers, and food chains show the flow of energy from consumers to producers.
B
Food chains show a single path of energy in an ecosystem, and food webs show overlapping pathways of energy in that ecosystem.
C
About ten percent of the energy is passed on to the next trophic level in food webs, but in food chains, about ninety percent is passed on to the next trophic level.
D
Heat is lost when energy is passed on to the next trophic level in food chains, but in food webs, heat is not lost when energy is passed on to the next trophic level.

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