A population is defined as:

A population is defined as: a. organisms that live together b. organisms of the same species that live in the same area at the same time c. a croup...

Which of these is/are true?

Which of these is/are true? a. 10 percent of the energy in one trophic level is transferred to the next level b. primary consumers usually eat secondary...

The troposphere is characterized by:

The troposphere is characterized by: a. very high levels of ozone b. extremely high pressure c. increasing temp with height d. presence of aurora e....

Eutrophication is:

Eutrophication is: a. the conversion of organic nitrogen to inert nitrogen by microbial activity b. the accumulation of phosphorous in the atmosphere c....

Energy enters almost all ecosystems as:

Energy enters almost all ecosystems as: a. mechanical energy b. chemical energy c. nuclear energy d. radiation e. none of these Answer: ...

A scientific theory is:

A scientific theory is: a. the same thing as a scientific law b. different from a scientific law in that theories are often represented by an equation c....

In the scientific method,

In the scientific method, a. hypotheses are statements of fact b. theories and laws are the same thing c. hypotheses can't be proven 100 % true d....

The troposphere is characterized by:

The troposphere is characterized by: a. very high levels of ozone b. extremely high pressure c. increasing temp with height d. presence of aurora e....

Eutrophication is:

Eutrophication is: a. the conversion of organic nitrogen to inert nitrogen by microbial activity b. the accumulation of phosphorous in the atmosphere c....

Most ecotoxicologists currently believe that

Most ecotoxicologists currently believe that a. endocrine disruptors are far less of a problem than environmental scientists claim b. dilution is...

Loam:

Loam: a. contains roughly equal percentages of sand and silt b. is an ideal agricultural soil c. has good aeration and drainage d. has a medium ability...

A "dose-response curve" shows:

A "dose-response curve" shows: a. the dose of a given chemical that is lethal to 50% of population b. the dose of a given chemical that causes 50%...

Where would I find the thickest a-horizon?

Where would I find the thickest a-horizon? a. a brazilian rain forest b. a coniferous forest in northern Canada c. a desert in arizona d. a grassland...

GM (genetically modified) crops and goods:

GM (genetically modified) crops and goods: a. have less nutritional value than the original product b. are more susceptible to pests c. can often...

The aral sea:

The aral sea: a. is located between on the baltic peninsula b. is/was the smallest of the earth's six oceans c. was drained by diverting water for...

Emerging diseases are

Emerging diseases are a. infectious diseases that were not previously found in humans and typically jump from an animal host to humans b. infectious...

Most freshwater is present in the form of:

Most freshwater is present in the form of: a. water in lakes b. ice caps and glaciers c. water in rivers d. groundwater e. atmospheric water vap...

Metapopulations can be characterized by:

Metapopulations can be characterized by: a. extremely large populations of different species b. a community of spatially separated populations of...

Endocrine disruptors:

Endocrine disruptors: a. include DDT, mercury and phthalates b. rarely bioaccumulate c. affect the reproduction of fishes, birds, and reptules but...

In an el nino, we expect:

In an el nino, we expect: a. abnormally cold water in the eastern pacific b. collapse of the fishing industry in the philippines c. abnormally strong...

Hurricanes (or tropical cyclones) are

Hurricanes (or tropical cyclones) are a. formed around a center of very high pressure b. fueled by the evaporation of water, Which releases heat...

Which of the following is/are true:

Which of the following is/are true: a. typhoons and cyclones are physically different from hurricanes b. the azores high can sometimes push developing...

Which of these has the most dense water?

Which of these has the most dense water? a. lake pontchartrain b. shallow water in the gulf stream c. the bottom of the south atlantic d. the bottom...