Exam 5 Practice Questions – Flashcards
Unlock all answers in this set
Unlock answersquestion
Which of the following is Abiotic?
answer
a rock
question
What is a population?
answer
A group of organisms living in a particular geographic area.
question
Which of these is community?
answer
all of the organisms living in your home
question
Which of the following is a behavioral response to environmental variability?
answer
Migrating to a different location.
question
In an aquatic ecosystem, what name is given to the region where photosynthesis can occur?
answer
Photic zone
question
wetlands________
answer
are important in improving water quality.
question
What are estuaries?
answer
transition areas between a river and the ocean.
question
Which of the following can moderate climate by absorbing heat when the air is warm and releasing heat when the air is cold?
answer
Oceans
question
Water-storing plants and deeply rooted shrubs are plants that characterize________
answer
deserts
question
The Sahara desert and the Negev Desert belong to the same________
answer
Biome
question
Permafrost, or permanently frozen subsoil, characterizes__________.
answer
Tundra
question
The greenhouse effect causes an increase in global temperatures. this increase is due primarily to__________.
answer
CO2 and other greenhouse gases trapping heat on earth.
question
In the oceans, global warming has__________.
answer
Made the water more acidic.
question
Which of the following would increase your ecological footprint?
answer
Eating more beef and less chicken
question
Examine the figure below. Which part of earth receives the greatest intensity of solar radiation?
answer
Equator
question
Which of these characteristics of Type 1 survivorship found in human populations?
answer
Most individuals survive to older age intervals
question
Which of these best describes Type III survivorship found in fish or amphibians?
answer
Survivorship is high for the few individuals that survive to a certain age.
question
________ is the maximum population size that a particular habitat can support.
answer
Carrying capacity
question
According to the logistical growth model, what happens to a population when the size of the population reaches carrying capacity?
answer
The growth rate drops to zero
question
Competition among individuals of the same species is ________ competition
answer
intraspecific
question
Which of these factors operates on populations in a density-dependent manner?
answer
food supply
question
Non-native species can have important effects on biological communities by__________.
answer
Preying upon native species competing with native species for resources, and reducing biodiversity.
question
The use of indian mongoose to control rat populations__________
answer
became a disaster when the mongoose turned out to be as invasive as its target.
question
Most crop pests________
answer
have an opportunistic life history
question
Throughout most of human history, human population size________
answer
grew very slowly.
question
In most developed countries, overall population growth rates__________
answer
Are near zero, so the population id fairly stable.
question
A study of the human ecological footprint conducted by the World Wildlife Fund in 2008 shows that____________.
answer
We have already exceeded the planet's biocapacity per person.
question
The ecological footprint of the United States____________.
answer
indicates that americans consume a disproportionate resources an produce a disproportionate amount of waste.
question
Approximately when did male fur seals reach carrying capacity?
answer
1945
question
The single greatest threat to biodiversity comes from_____________.
answer
Habitat destruction and fragmentation.
question
Which is FALSE about the diagrams shown below?
answer
The United States and Afghanistan have very similar birth rates.
question
An example of mutualism, or +/+ relationship is___________.
answer
The relationship between corals and unicellular algae.
question
As a result of a severe disturbance removing all vegetation and soil, a community wil_________________.
answer
Undergo succession
question
Organisms that consume photosynthesizing organisms only are __________________.
answer
primary consumers.
question
In the food chain: Grass----->antelope------> human---->lion, the antelope is_________________.
answer
Both herbivore and primary consumer.
question
Most decomposers are___________.
answer
Fungi and bacteria.
question
Commensalism is a type of species interaction, similar to mutualism, where one species benefits, but in this case the other species is unaffected. This type of interaction is symbolized +/0. Herbivory is another type of species interaction where one species benefits and the other species is harmed and is symbolized as _____________.
answer
+/-
question
In Yellowstone National Park, wolves were hunted to extinction in the 1920s. A current restoration project has reintroduced wolves to yellowstone national park. Predict the response of the Yellowstone ecological community if wolves are a keystone species.
answer
species richness should increase, and the relative abundances of each species should be about equal.
question
What is one way in which energy flow differs from chemical cycling?
answer
Energy flow is in one direction; chemical elements can be recycled.
question
Refer to the following figure. if there were an additional trophic level (quaternary consumers) that consisted of organisms that prey on snakes, about how much energy would be available to organisms at a trophic level?
answer
1 kcal
question
On average what percentage of the energy is one trophic level becomes incorporated into the next higher trophic level and is lost as heat in each trophic level and therefore unavailable to the next trophic level?
answer
10%, 90%
question
The ultimate source of energy flowing into nearly all ecosystems is______________.
answer
Sunlight
question
Refer to the figure above. All of the living components of this coral reef represent a___________.
answer
Community
question
In the ecosystem shown, a toxin that accumulates in body tissues would have the largests effect on_____________.
answer
Fish that eat shrimp and other invertebrates (secondary consumers)
question
Approximately 78% of the air we breathe (or the atmosphere) is _______________ gas
answer
N2 (Nitrogen)
question
Which of these organisms convert atmospheric nitrogen gas to a form that can be utilized by plants?
answer
Nitrogen fixing bacteria found in the soil.
question
The major abiotic reservoir for phosphorous is ___________.
answer
rock
