Apes
If the population of a country grows at a rate apporzimately 5% per year the number of years required for the population to double is closest to
15 years
Which of the followinf best shows the process of evoloution
A population of mosquitoes develops resistance to a pestiside
Which of the followinf regions of the ocean is least likely to contain photosynthetic organisms
Abyssal zone
Measures on the ph scale
Acidity
Which of the following procedures Would be best for remediating (fixing it) the effects of soil slainization(ammount of salt in soil)
Addition of large amount of warer to leach out salts
Traveling southward from the artic regions of canada to tropics of panama one passes through several biomes-- tundra confierous forest temperate deciduous forest and tropical rain forest. This pattern of change in vegetation is prinarily result of
An increase in mean annual temperature and mean annual precipitation
Which of the following is most likely to result from the destruction of wetlands sureounding a river
An increased frequency of flooding in the river valley
The ammount of sediment depositied at the mouth of a river system is likelt to be increased by the presence upstream of which...
Artificial levees and embankments,
The major reservoirs of nitrogen and sulfur in the biosphere are correctly identified by which
Atmosphere and rocks
Elements that cycle in the environment and that also have a gaseous phase at some point in their cycle include which of the following
Carbon and sulfur
Exemplified by moss growing on a tree trunk in a forest
Comensalism
One solution for reducing the amount of atmospheric carbon dioxide would be to
Decrease the use of fossil fuels
Of the organisms which occupies the lowest trophic level -spider deer lion snale hawk
Deer
Decreased by the the breakdown of organic waste
Dissolved oxygen
Which of the following methods of agricultural irrigation results in the loss of the least amount of water evaporation
Drip irrigation
Which pf the following methods of agricultural irrigation results in the loss of the least amount of water evaporation
Drip irrigation
Of the followinf which is the best example of point source water polution
Factory eflient (like out of a pipe from a factory)
Hippco
Habittation Invasive species Population and polution people Climate change Over explotation
Measures by the ammount of CA2+ and Mg2+
Hardness
The presence of high levels of fecal coliforn bacteria in a water source indicates that the water...
Has been contaminated by untreated human or animal waste
Which of the following is most likely to be the direect result of lack of genetic diversity in a food crop such as corn
Increases susceptibility to plant disease
Exemplified by starlings displacing bluebirds from nesting sites
Interspecific competition
Eutrophic
Lack of oxygen , algae bloom
Oligotrophic
Like Lake Tahoe Very little turbidity Low BOD Not like algae bloom
Whoch of rhe followinf is the zone of a pond or lake in which rooted, emergent plants such as cattails and rushes are locates
Littoral
This is flamable gas produces by land fills
Methane
Exemplified by bees consuming nectar and carrying pollen from one flower to another
Mutualism
Whoch of the folowing is likely to minimize soil erosion
No till agriculture
The major cause for the decline in the worldwide catch of fish since 1990
Overfishing
Which of the following is an effective alternative to chlorine for disenfectinf waste warer in a municipal treatment plant
Ozone
In the united states the largest single component of municipal solid waster
Paper
Exemplified by ticks feeding on a deer
Parasitism
The two major processes involved in the carbob cycle are
Photosynthesis and respiration
The major biological source of dissolved oxygen in the ocean comes from
Photosynthesis by phytoplankton
Primary treatment
Physical, we let it sertlle
An advantage of recycling aluminum rather than disposing of it in landfills is that Aluminum can be
Produced from recycled metal using much less energy than is required for its production from aluminum ore
Fragmenting one large park or preserve into many small parks with human habitation in between them is most likely to lead to which of the following
Reduction is species diversity
In general, which of the followinf is the best long term method of preventing extintictions
Rotecting the habitat of endangered species
Which method of solid waste disposal is used most frequentlt in the united states
Sanitary landfill
Which of rhe followinf is the best example of a keystone species
Sea otter
Biological oxygen demand (BOD(
The amount of dissolved oxygen needed for an aerobic bacteria to decompose
Which of the following is most likely to occur in a forested region that has been recently clear cut.... How acoid
The concentration of nitrates in streams running through the region will increase... Riparian buffer zone
Reasons that human populations historically have settled in floodplains include which of the following?
The soil in floodplains is unusually fertile, the terrain in floodplains tends to be flat and floodplains are close to rivers for transportation
The ultimate source of energy for terrestrial ecosystem is
The sun
Rule of 70
To see how long 70 will increase by 2% divide 70 by 2 amd answer is 35
Overgrazing of public by privately owned livestock is an example of ..
Tragedy of the commons
Secondary treatment
Trying to get orgnaic matieral and nutrients
Caused by suspened particulates
Turbidity
Ozone in the statosphere is important to organisms at earths surface because ozon molecules are very strong absorbers of
Ultraviolet rays