Environmental science 12a final exam scored 90%
What are some ways that the oceans moderate climate?
The oceans absorb solar energy.
The oceans absorb carbon dioxide from the atmosphere.
The oceans store carbon as deep ocean sediments.
What could reduce the biodiversity of a population?
overhunting of animals
a change in climate
inbreeding between individuals
What describes the conditions needed for natural selection to occur?
Variation in traits exists between organisms.
More offspring are produced than can survive.
Organisms compete for resources.
What explains the change in the Biston betularia moth's population color during the
Industrial Revolution?
increased pollution, resulting in a change in the color of trees
What factors would naturally change an ecosystem?
seasons
volcano
flood
fire
What is an example of a feedback mechanism that affects fish populations in their
natural ecosystem?
When cod populations are small, herring control cod numbers by negative feedback.
When cod populations are large, cod control herring numbers by negative feedback.
Which point on the graph indicates where resources first become limiting?
not c or d
What explains why Species B declines when grown together with Species A?
It is outcompeted by Species A.
Which correctly compares the relationships?
Both examples are types of symbiosis. However, in the case of the sea anemone, both
partners benefit, while only one organism benefits in the case of the caterpillar.
Which are abiotic factors of both aquatic and terrestrial ecosystems?
oxygen
sunlight
What are the consequences of the introduction of zebra mussels to the Great Lakes
ecosystem?
(.67/1)
decreased ecosystem biodiversity
increased algal growth
(both correct one more answer needed for 100%)
What describes the movement of matter and energy through an ecosystem?
energy flows; matter cycles
What percent of the Sun's energy that enters the ecosystem is expected to be available
to the penguin?
What are some ways that the oceans moderate climate?
The oceans absorb solar energy.
The oceans absorb carbon dioxide from the atmosphere.
The oceans store carbon as deep ocean sediments.
What could reduce the biodiversity of a population?
overhunting of animals
a change in climate
inbreeding between individuals
What describes the conditions needed for natural selection to occur?
Variation in traits exists between organisms.
More offspring are produced than can survive.
Organisms compete for resources.
What explains the change in the Biston betularia moth's population color during the
Industrial Revolution?
increased pollution, resulting in a change in the color of trees
What factors would naturally change an ecosystem?
seasons
volcano
flood
fire
What is an example of a feedback mechanism that affects fish populations in their
natural ecosystem?
When cod populations are small, herring control cod numbers by negative feedback.
When cod populations are large, cod control herring numbers by negative feedback.
Which point on the graph indicates where resources first become limiting?
not c or d
What explains why Species B declines when grown together with Species A?
It is outcompeted by Species A.
Which correctly compares the relationships?
Both examples are types of symbiosis. However, in the case of the sea anemone, both
partners benefit, while only one organism benefits in the case of the caterpillar.
Which are abiotic factors of both aquatic and terrestrial ecosystems?
oxygen
sunlight
What are the consequences of the introduction of zebra mussels to the Great Lakes
ecosystem?
(.67/1)
decreased ecosystem biodiversity
increased algal growth
(both correct one more answer needed for 100%)
What describes the movement of matter and energy through an ecosystem?
energy flows; matter cycles
What percent of the Sun's energy that enters the ecosystem is expected to be available
to the penguin?
