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