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BIO 156- FINAL EXAM QUESTIONS AND CORRECT ANSWERS WITH COMPLETE SOLUTIONS | UPDATED 2025
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BIO 156- FINAL EXAM QUESTIONS AND CORRECT ANSWERS WITH COMPLETE SOLUTIONS | UPDATED 2025
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BIO 156- FINAL EXAM QUESTIONS ANDCORRECT ANSWERS WITH COMPLETE
SOLUTIONS | UPDATED 2025
The biological and physical surroundings in which any given living organism exists
is the definition of - ANSWER Environment
Environmental science is an interdisciplinary field consisting of which three main
branches - ANSWER Natural science, social science, humanities
Environmental problems are difficult to solve for many reasons. Which of the
following is NOT one discussed in class? - ANSWER The consequences of
human actions are impossible to find solutions to
Which of the following is NOT a characteristic of sustainable development -
ANSWER Sustainable development requires finding new resources to replace
old ones
When resources aren't owned by anyone (a common pasture) and individuals who
try to maximize their own benefit (many cattle), end up harming the resource
(depleting the grade), this concept is known as - ANSWER Tragedy of the
commons
Why is peer review an important component of the scientific process? -
ANSWER It provides an important check from other experts on the validity of
new scientific studies
,White-nose syndrome (WNS) has killed many bats, but some populations have not
yet been affected. Although WNS has not yet impacted all regions where bats live,
the disease's likely spread in the face of global warming is cause for concern. Bats
are important predators of mosquitoes and other nocturnal insects, and they play
an important role in the ecosystem. The continued decline of bat populations
could have severe impacts on the environment and the species that share it,
including humans. Which example represents an application of the precautionary
principle as it relates to the spread of WNS? - ANSWER Federal policy makers
enacting a comprehensive plan to address WNS in bats
Which of the following is a biotic factor in a tropical coral reef? - ANSWER
Parrotfish
The wolf population in Yellowstone National Park in the early twentieth century
was between 300 and 400 individuals. Hunters reported killing about 136 wolves.
By the middle of the twentieth century, wolves were no longer found in
Yellowstone. Given that hunters didn't kill all the wolves, what is the best
explanation for why the wolf population in Yellowstone died out? - ANSWER
The population dropped below the minimum viable population size
In Yellowstone, the wolf population is the primary factor in keeping the elk
population in check. The elk population then regulates the aspen tree population.
This chain (wolf-elk-aspen) is an example of - ANSWER Top-Down Regulation
How does exponential growth differ from logistic growth? - ANSWER
Exponential growth occurs when the population is at its biotic potential, whereas
logistic growth is limited by the carrying capacity of the environment
When graphed, exponential growth results in a J-shaped curve, whereas logistic
growth results in an S-shaped curve
, Exponential growth is typically seen when a species first enters a new
environment, whereas logistic growth is typically seen when a species is sustained
in its long-term environment
Select the explanation for why density-idependent factors do not predictably
regulate population size - ANSWER Density-independent factors are typically
abiotic and chaotic in nature
Does habitat fragmentation favor core species or edge species, and why are these
species favored? - ANSWER Edge species, because habitat fragmentation
reduces core habitat and increases the amount of edge habitat
What is the defining feature of a keystone species? - ANSWER Keystone species
impact the ecological community to a greater extent than their population
numbers would suggest
How is genetic drift different from natural selection? - ANSWER Genetic drift is
caused by random chance, whereas natural selection is driven by environmental
influences
How does artificial selection differ from natural selection? - ANSWER In
artificial selection, humans are the selective pressure
In what ways are humans contributing to accelerated extinction rate? -
ANSWER Deforestation in biologically diverse regions, such as the Amazon
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