Exam 6: Environmental Science

Drinking of fluoride containing water results :

Which of the following regarding ecological pyramids is not correct?

High biological oxygen demand indicates:

Growing agricultural crops between rows of planted trees is known as

Many freshwater animals cannot live for long in sea water and vice versa mainly because of the

One greenhouse gas contributes 14% to total global warming and another contributes 6%. These are respectively identified as

The pollution which does not persistent harm to life supporting system is

Percentage of forest area recommended by the the national forest policy for plains is

The range of normal human hearing is in the range of

The cutting down of trees and setting them on fire and raising crops on the resulting ash is called:

Which of the following statements regarding species interdependence are true? A. An association of two species where one is benefitted and other remains unaffected called mutualism B.An interspecific association where both partners derive benefit from each other is called commensalism C. A direct food relation between two species of animals in which one animals kills and feed on another is referred as predation D. A relationship between two species of organism where both the partners are benefitted from each other is called symbiosis.

In a pyramid of numbers, in a grassland ecosystem, the largest population is that of

Man made sources of radiation pollution are:

Commonly used radioactive isotopes in scientific research

Soap and detergents are the source of organic pollutants like:

Example of primary pollutant

Ozonosphere seen in

The formula of growth rate for population in given time is

Which of the following is false?

Chipco movement is a public agitation that occurred in