Flashcards in 18,19,20 Deck (111):
An ideal habitat with unlimited resources is associated with...
The maximum population a habitat can support is its...
Logistic growth invokes
Population growth is slowing down as the population approaches
In exponential growth
Population sizes grows faster and faster as the population gets bigger.
Which of the following would not cause population size to decrease?
Increased birth rates
To figure out the human population density of your community, you would need to know the number of people living there and ....
The size of the area in which they live
An example of population density is...
The number is paramecium caudatum in a 250-mollified solution within a glass flask
Chimpanzees have a relatively low birth rate. They take good care of their young and most chimps live a long life. The chimp survivorship curve would look like...
A relatively flat line that drops steeply at the end.
A population is defined as...
A group of individuals of a single species that occupies the same general area
A set of traits that affects an organism's schedule of reproduction and survival is called its....
A population will always grow exponentially if....
There is no limiting factors.
When birth rate equals death rates,.....
The size of a population remains constant
A population of mice has grown so rapidly that there are 2,400 individuals in an ecosystem that will support about 1,800 mice. The mouse population is most likely to ..
Undergo a dramatic decline in size, possibly to a stable level at or below 1,800 individuals
A newly mated queen ant establishes a nest in a unoccupied patch of suitable habitat. Assuming that no disaster strikes the best, which type of equation is likely to best describe its population growth?
No population can grow indefinitely. The ultimate size of any population is limited by...
The carrying capacity of its environment
Which one of the following would most likely be an example of an abiotic factor that limits population growth?
Daily temperature extremes
Human population growth is...
The single greatest current. Amuse of population decline is...
A non-native species that has spread far beyond the original point of introduction and causes environmental or economic damage is called an
Which of the following is a definition of the ecological footprint
The estimate is the amount of land required to provide the raw materials an individual or a population consumes
Following the station fire in California, scientists are studying the role that what three fire-related things play in killing fish?
What, fire retardant, and debris in the water
After a large fire, the burned area is referred to as what?
What effects do ash particles have on a steam?
They increase alkalinity
What is expected to happen to most of the ash from the station fire?
It is expected to wash into streams and rivers.
The population of Greece is expected to....
True or false: assuming the current trend continues, in 30 years Greece will have more children than reproductive-age
True or false: assuming the current trend continues in 30 years Greece will have more children than elderly members is the population
True or false: assuming the current trend continues , in 30 years Greece will have more reproductive-age individuals than children.
True or false/ assuming the current trend continues.. In 30 years Greece will have more elderly than reproductive-age individuals
Greece had more females than males in 2000. Which of the following is the most likely explanation for this?
Males generally have a shorter life span than females.
The population is Colombia is currently?
True or false: assuming the current trend continues in 30 years Colombia will have more children than reproductive-age individuals
True or false/Assuming the current trend continues in 30 years Columbia will have more children than elderly members of the population.
True or false: assuming the current trend continues in 30 years Colombia will have more reproductive-age individuals than children
Assuming the current trend continues in 30 years Colombia will have more elderly than reproductive-age individuals
In the ecosystem budget, primary productivity is like...
A young, growing calf kept in ideal conditions consumes 100 pounds of grain. As a result, you would expect the calf to put on about___ pounds of biomass.
To measure primary productivity in a grassland ecosystem, you should...
Exclude consumers; periodically mow, collect, and weigh the plants ;and. Calculate plant biomass production per unit times
What's is the approximate maximum population of lions that the herbivores might support assuming that each lions biomass us equivalent to a single herbivores
How many people might be supported on a diet of beef produce by the ranch?
At most 10
An example of an "ecosystem service" that is vital to people is?
Biodiversity includes genetic diversity, species diversity, and ....
One of the major contributors to extinction of species today is..
Which is most likely to lead to decreased biodiversity?
The introduction of invasive species
All organisms in a particular area make up a
According to the principal of interspecific competition, two species can not continue to occupy the same...
An organism's "trophic level" refers to...
What it eats
An organism gets carbon by using dioxide in the atmosphere to make sugar molecules. This organism is a...
Which organisms play a role in returning carbon to the atmosphere?
Producers, consumers, and decomposers every carbon atom in the organic molecules that make up your body MUST recently have been part of a producer
Imagine following a single carbon atom through the carbon cycle. Which of the following is a possible path for the carbon atom to take?
The atmosphere, a plant, a herbivore, a decomposer, then back to the atmosphere
Which process return carbon to the atmosphere?
Cellular respiration only
Consider this segment of a food web. Snails and grasshoppers eat pepper plants; spiders eat grasshoppers; shrews eat snails and spiders; owls eat shrews. The shrew occupies the tropic levels of ...
Secondary and tertiary consumers
Which of the following describes the number of different species in the community?
During ecological succession, the species composition of a plant community....
Changes gradually because each species responds differently to changes in environmental factors
Which of the following is an example of primary succession?
Colonization of a newly formed volcanic island.
What type is population interaction benefits neither population?
Flounder look like the sea floor. This is Ann example of....
A tick has what type of relationship with a dog?
A lichen is actually composed of two organizations: a fungus and a alga. They depend on each other for survival. The most specific term that describes third relationship is ....
Why does biological magnification occur?
Although the amount of organic material decreases with increasing trophic level, the amount of toxin remains the same.
Which is the following is a producer?
Which of the following best illustrates ecological succession
Grass grows on a sand dune, then shrubs and then trees
The energy for nearly every organism in almost every ecosystem ultimately comes from
Biogeochemical cycles are crucial to ecosystem functions because....
Nutrients and other life-sustaining molecules are in limited supply and must be continually recycled
The biggest difference between the flow energy and the flow of chemical nutrients in an ecosystem is that...
Nutrients are recycled, but energy is not
Which of the following is a component of the carbon cycle
Returned of CO2 to the atmosphere by animal and plant respiration
The study and protection of biological diversity is a field called?
Regions with high concentrations of species, especially species that are endangered or threatened, are referred to as...
Biodiversity hot spots
An assemblage of interacting ecosystems makes up a....
What best describes the trend in the species versus island area data?
The increase in numbers is species with increasing land area slows for larger islands suggesting that there may be a maximum number of species an island can hold regardless of size
Roughly five order of magnitude separate the smallest and largest islands on the log plot. How many orders of magnitude separate them on the standard plot?
If another island were present in the Caribbean that was about 1000 square miles in size, how many species of amphibians and reptiles would you expect to find on it? Choose the most likely number from the options below?
Which continent has more than 12,000 cubic kilometers of water?
Africa is much larger than Europe why doesn't it have more fresh water?
Mush of its land area is covers with desert
Which Continent has the highest ratio of available fresh water to population size?
Wh oh continents currently have diffident water to meet the needs is thier population
North America. South America, Africa, Australia
True or false: fresh water available per capita should remain stable over the next 50 years
True or false/Asia has abundant water resources, but it's high population size is causing water shortage
True or false:Is someone of Australia's water resources could be diverted to Asia, it would eliminate Asia's water shortage
The study of the interaction of organisms with each other and their environment invokes non-living factors also called_____ and living factors which are refers to as _____
Abiotic components; biotic components
lists the ecological hierarchy from largerts to smallest
Biosphere,ecosystem, community, population, organism
A scientist is studying how sea slugs respond to predators. Which hierarchical level of ecology does this represent?
Which hierarchical level is represented by a survey of students and their habits?
What is the largest hierarchical level that global warning affects?
An ecologist might conduct research to answer which of the following questions?
How do tapeworms cope with life in the human intestine
Which of these would be considered a biotic component of your environment?
Which of these is a population?
All of the people living in your state
The sum of all earth ecosystems is called the___
The specific place in which an organism lives is its__
What is the ultimate source of engery for nearly all surface terrestrial and shallow water ecosystem?
In hot desert environment, beetles will often orient themselves so they are facing the sun. This reduces direct solar radiation so the animals do not overheat. This is an example of___
A behavioral response
Photosynthetic organisms, such as plants and algae, depend on the availability of two important inorganic nutrients, ____ and ____.
Nitrogen and phosphorus
Which of the following is an example of a biome that is transitional between aquatic and terrestrial ecosystem?
What are key factors for determining the biome of a specific region?
Both temperature and rainfall
The global water cycle supports a net flow of atmospheric water vapor ____
From the ocean to land
The photic zone is a shallow water near shore and the unpoetic layer of water away from store where....
Light is available for photosynthesis
The dominant greenhouse gas is____
An increase in mosquitoes has many official concerned about what illness?
West Nile virus
groupings is mosquito eggs are called what?
What fish is often used to eat mosquito larvae in the ponds of foreclosed homes?
What mosquito arrived in the U.S in 1985 and is wreaking havoc in parts of the northeast?
The Asian tiger mosquito
What is the best statement regarding the graph of atmosphere Co2 concentrations?
Atmosphere CO2 concentration have increased by more than 15% over the past 50 years
What is the best statement regarding the graph in step 2 showing atmosphere CO2 and surface temperature changes over the past 50 years?
This data is consistent with the hypothesis that increased atmosphere concentrations of CO2 may be causing an increase In average surface temperatures
Assume that you wanted to give the impression that, although CO2 levels have indeed increased over the 50 years, they have not had a significant impact on average surface temperature. Which of the scales shown in step 3 would be the best choice?
For which of the scales shown in step 3 is the increase in CO2 concentration less than 10%?
Choose the list of predictions trajectories for CO2 concentration that matches them in order with the aggressive, moderate, and mormal control scenarios
C, B, A
If the USA adopted and maintain a policy of minimal control of CO2 emissions what level would we expect its emissions to be 2020?
Assuming that increasing CO2 concentration are directly linked to increased surface temperature which scenario should result in a reduction of temperature to below thier 1960-1990 averages by 2040?
During what time period was the growth of fish captures greatest?
1955 to 1979