Environmental Science MCQ Questions and answers | EVS MCQ

The river which has high level of BOD is indicative of high pollution in the river as the dissolved oxygen available in the water is being used by the bacterias, and this result in less oxygen available to fish and other aquatic beings. Nitrates and phosphates contribute to high level of BOD.

The name given to a liquid drop of dew that freezes when the air temperature drops below freezing is frozen dew.

The ozone hole is not technically a “hole” where no ozone is present, but is actually a region of exceptionally depleted ozone in the stratosphere over the Antarctic that happens at the beginning of Southern Hemisphere spring (August–October).

The tendency to maintain a stable, relatively constant internal environment is called homeostasis.

Hoolock Gibbon is the only Ape found in India, a primate species from the gibbon family of Hylobatidae. The Hoolock Gibbons of India are second largest of the gibbons, found only at south of Brahmaputra and east of the Dibang rivers in North East Indian states.

The indoor pollutant radon which is a radioactive gas causes lung cancer.

Although hypothermia is most common in patients who are exposed to a cold environment, it can develop secondary to toxin exposure, metabolic derangements, infections, and dysfunction of the central nervous and endocrine systems.

Hotter summers and colder winters than at present

House lizard - Autotomy

Flora is all the plant life present in a particular region or time, generally the naturally occurring (indigenous) native plants. The corresponding term for animal life is fauna. Flora, fauna, and other forms of life, such as fungi, are collectively referred to as biota.