Bio Quiz 6 Flashcards
An organism that tends to grow exponentially when allowed to reproduce is
None of the listed answers are correct dispersed. All of the listed answers are correct a K-strategist. an r-strategist. polygenic.
an r-strategist
An organism that obtains energy from organic wastes and dead bodies is a(n)
omnivore. None of the listed answers are correct herbivore. carnivore. detritivore. All of the listed answers are correct
detritivore
Which of the following causes acid rain?
burning high-sulfur coal None of the listed answers are correct releasing chlorofluorocarbons polluting ground water All of the listed answers are correct scrubbing smokestack emissions
burning high-sulfur coal
Why is it unlikely that natural selection will quickly reduce the frequency of hemophilia?
All of the listed answers are correct
Hemophilia is not a genetic disorder.
The frequency of recessive homozygotes is too great.
Natural selection acts only on recessive homozygotes.
Dominant homozygotes can have affected children.
None of the listed answers are correct
Natural selection acts only on recessive homozygotes.
Plants return water to the atmosphere by
succession. None of the listed answers are correct nitrification. assimilation. transpiration. All of the listed answers are correct
transpiration
In a population model, a limited resource is known as a
density-dependent factor. None of the listed answers are correct All of the listed answers are correct logistic model. density-independent factor. polygenic trait.
density-dependent factor.
The interaction between a spruce tree and a hemlock tree, both of which require nitrogen from the soil, is an example of
competition.
commensalism.
mutualism.
succession.
None of the listed answers are correct
All of the listed answers are correct
competition
Which role is not performed by bacteria in the nitrogen cycle?
All of the listed answers are correct None of the listed answers are correct fixing nitrogen changing nitrates to ammonia changing urea to ammonia turning nitrates into nitrogen gas
changing nitrates to ammonia
A _________ is a class of stable chemicals that break down and release free chlorine atoms high in the atmosphere.
hydrocarbon DDT All of the listed answers are correct CFC greenhouse gas None of the listed answers are correct
CFC
Which sequence shows the correct order of succession at Glacier Bay, Alaska?
All of the listed answers are correct
Dryas, hemlock, alder
alder, Dryas, hemlock
Dryas, alder, Sitka spruce
mosses, hemlock, Sitka spruce
None of the listed answers are correct
Dryas, alder, Sitka spruce
A mountain lion is a(n)
omnivore. All of the listed answers are correct herbivore. None of the listed answers are correct detritivore. carnivore.
carnivore
The principle of competitive exclusion indicates that
niche subdivision may occur.
one species will eliminate a competing species if their niches are very similar. X
competition ends in worldwide elimination of a species
None of the listed answers are correct
a niche can be shared by two species if their niches are very similar.
All of the listed answers are correct
one species will eliminate a competing species if their niches are very similar. X
What critical role is played by fungi and bacteria in any ecosystem?
All of the listed answers are correct decomposition physical weathering primary production boundary setting None of the listed answers are correct
decomposition
According to the Hardy-Weinberg principle, allele frequencies in randomly mating populations without selection
All of the listed answers are correct
None of the listed answers are correct
do not change.
change when birth rate exceeds death rate.
increase and then decrease.
decrease and then increase.
do not change
The ways in which an organism interacts with its environment make up its
All of the listed answers are correct habitat. None of the listed answers are correct niche. space. ecosystem.
Niche
Ecosystems differ from communities in that ecosystems usually contain
several climates. only one food web. None of the listed answers are correct only one habitat. All of the listed answers are correct several communities.
several communities.
The burning of fossil fuels has changed the atmosphere by
It is the largest extinction event since the dinosaurs disappeared.
None of the listed answers are correct
increasing the amount of atmospheric carbon dioxide.
Potentially useful species are becoming extinct.
One of its causes is the destruction of tropical rain forests.
All of the listed answers are correct
increasing the amount of atmospheric carbon dioxide.
Which of the following is a transitional zone between tropical rain forest and desert?
None of the listed answers are correct All of the listed answers are correct tundra temperate deciduous forest taiga savanna
savanna
The process by which materials pass between the nonliving environment and living organisms is called a(n)
energy pyramid. None of the listed answers are correct All of the listed answers are correct biogeochemical cycle. food web. primary succession.
biogeochemical cycle.
Which of the following statements about the extinction of species that is now occurring is not true?
One of its causes is the destruction of tropical rain forests.
It is confined to tropical countries.
It is the largest extinction event since the dinosaurs disappeared.
None of the listed answers are correct
All of the listed answers are correct
Potentially useful species are becoming extinct.
It is confined to tropical countries
