Environmental Science
Definition of ecosystem is

The community of organisms together with the environment in which they live
The part of the earth and its atmosphere which inhibits living organisms
The abiotic component of a habitat
A community of organisms interacting with one another

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Environmental Science
Which of the following regarding ecological pyramids is not correct?

In most ecosystems, the pyramid of numbers and biomass are up right
In deep water ecosystem, the pyramid of biomass is upright
In tree dominated ecosystem the pyramid of numbers is inverted
The total energy flow at successive tropical level always decreases
The pyramid of energy expresses mainly the rate of food production

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Environmental Science
Which of the following statement is incorrect regarding ecological pyramids

The pyramid of biomass is upright in grass land ecosystem
The pyramid of numbers is upright in grass land ecosystem
The pyramid of energy is inverted in ocean ecosystem
The pyramid of biomass is inverted in aquatic ecosystem

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Environmental Science
Which of the following statements is not correct?

A change in the air temperature can change the relative humidity.
During the winter, low relative humidity can irritate the mucus membranes in the nose and throat.
The length of human hair changes as the relative humidity changes.
The relative humidity is a measure of the air's actual water vapor content.

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