Term
| What is the difference in the adaptation of a sled dog's (such as a Husky) thick coat of hair to help it withstand the cold temperatures of Arctic winters and a dog that adapts to cold temperatures in the fall by growing a thickened coat? The adaptation of the sled dog best describes adaptation at the ____________ level while the dog exposed to seasonal colder temperatures has _____________. |
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Definition
| Population; physiological modifications at the individual level |
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Term
| Evolution occurs as a result of |
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Definition
| Better survival or reproduction rates by individuals with a particular characteristic |
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Term
| Which of the following is a physiological modification used to adapt to environmental conditions? |
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Definition
| Leaves becoming thick and leathery on a plant growing in a dry, hot climate |
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Term
| Natural selection will ultimately make a species |
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Definition
| Better adapted to its environment |
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Term
| Regular lawn mowing selects for short-headed rather than tall-headed dandelions because |
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Definition
| Short flowers have less competition when the lawn is mowed often |
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Term
| Tolerance limits are _______ that limit a species' survival. |
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Definition
| Any environmental conditions |
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Term
| A species can withstand a wide range of pH as an adult but the juveniles can only withstand a narrow range of pH. The abiotic factor, pH, would best be described as a |
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Definition
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Term
| Which of the following fish species would be the best indicator of clean, well-oxygenated water? |
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Definition
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Term
| Populations are most critically limited by |
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Definition
| Any of these, depending on the system |
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Term
| Indicator species, such as lichens, generally have a ___________ tolerance range for a ___________. |
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Definition
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Term
A species can withstand a narrow range of temperature. Above 100F there are no species present. In the range from 97F to 100F and 90F to 94F there are a few species present. Below 90F there are no species present.
11. What would you label the range of temperature from 90F to 94F for this particular species? |
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Definition
| Zone of physiological stress |
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Term
| What would you label the range of temperature from 95F to 96F for this particular species in the scenario? |
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Definition
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Term
| A generalist is a species that |
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Definition
| Occupies a variety of ecological niches |
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Term
| Certain night-active moths and day-active birds are specialized nectar feeders. How do these species coexist if they are using the same resource for food? |
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Definition
| They do not compete for the nectar because they feed at different times of the day |
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Term
| Humans can best be described as |
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Definition
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Term
| Resource partitioning leads species to |
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Definition
| All of these would be a result of resource partitioning |
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Term
| Resource partitioning tends to lead to a high degree of _______ in species |
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Definition
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Term
| Intraspecific competition is competition among ________ for resources |
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Definition
| Members of a single species |
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Term
| Which of the following is not a common strategy for successful interspecific competition? |
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Definition
| The life cycle of dragonflies (the larva live in the water) |
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Term
| An especially effective strategy for reducing intraspecific competition is |
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Definition
| Different ecological niches for juveniles and adults |
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Term
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Definition
| A relationship in which both species benefit |
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Term
| In the partnership of a lichen, the fungus provides _________ and the relationship is best described as |
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Definition
| structure and moisture-holding ability; mutualism |
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Term
| A keystone species is a species whose presence |
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Definition
| Influences the population size of many other species in its community |
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Term
| In a commensal relationship, |
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Definition
| One species benefits while the other neither suffers nor benefits |
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Term
| A biological community's productivity is a measure of |
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Definition
| amount of biomass produced in the community |
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Term
| "Abundance" describes the total number of _________ while "diversity" describes the number of _________. |
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Definition
| Organisms in a community; species in a community |
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Term
| In a biological community where diversity is great, such as a tropical rainforest, the abundance of any one species is likely to be |
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Definition
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Term
| As a rule, near the Earth's north and south poles, |
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Definition
| Neither abundance nor diversity is high |
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Term
| Complexity in an ecological community has to do with the number of |
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Definition
| species at each trophic level |
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Term
A community with hundreds of different types of primary producers, a few herbivores and only one carnivore,
has |
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Definition
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Term
| A community that changes very little over time is said to have great |
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Definition
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Term
| In the coastal forest of Oregon an area was clear-cut for logging. Trees at the edge of the clearing and 200 meters into the forest died within a few months after the logging began. What is the best explanation for the death of the trees? |
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Definition
| increased sunlight, wind and temperature negatively affected the trees |
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Term
| A "closed community" has a |
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Definition
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Term
| A climax community is one that |
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Definition
| Is relatively stable and long lasting |
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Term
| Primary succession occurs when a community develops ____________ while secondary succession occurs when one ________. |
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Definition
| On unoccupied ground; biological community replaces another |
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Term
| As ecological development proceeds, a biological community |
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Definition
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Term
| The most common reason that introduced species cause trouble is because they |
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Definition
| Disrupt pre-existing niches |
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Term
| Which of the following migrations is likely to cause the extinction of a native species? |
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Definition
| The introduction of a predator onto an island originally free from predators |
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Term
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Definition
| Broadly similar environmental conditions |
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Term
| Location of specific biomes can be predicted based on |
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Definition
| Precipitation and temperature |
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Term
| In the graph of precipitation and temperature, desert biomes would fall in the area marked by the letter |
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Definition
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Term
| Neo and Trinity are in a biome that has relatively stable temperatures and abundant rainfall. They have a graph of precipitation and temperature similar to the one shown. Which letter marks the biome they are located in? |
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Definition
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Term
| Cloud forests are found in ________ areas in tropical regions. |
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Definition
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Term
| Neo finds himself sweating in a moist forest but there aren't many streams or wetlands. He is amazed by the tremendous amount of biodiversity including an abundance of biting mosquitoes. Has he inadvertently gotten closer to his goal of finding a boreal forest? |
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Definition
| No - the description is that of a tropical rainforest |
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Term
| A biome absent from North America is the |
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Definition
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Term
| Which of the following is an example of a specialization that plants in the desert may have? |
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Definition
| All of these are adaptations of plants living in desert conditions |
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Term
| Tropical seasonal forests are specially adapted to tolerate |
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Definition
| Annual cycles of severe drought and heavy rain |
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