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Bio 156- Final Exam Questions and Answers 2024
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Bio 156- Final Exam Questions and Answers
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Bio 156- Final Exam Questions andAnswers
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
The introduction of non-native or exotic species, such as the brown tree snake in Guam
Increasing human populations and resource consumption
Empirical science (examples) - Answer -Glaciologists study & record the rate of high-
altitude glacier melt
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