Environmental Science and Ecology - Mock Test 74

Question 731

A high Biological Oxygen Demand (Bod) indicates that?

A) water is pure B) absence of microbial action C) Low level of microbial pollution D) High level of microbial pollution

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Question 732

Algal bloom results in?

A) Global warming B) Salination C) Eutrophication D) Biomagnification

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Question 733

The green house gases, otherwise called radioactively active gases includes?

A) Carbon dioxide B) CH4 C) N2O D) All of these

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Question 734

The major pollutant from automoblie exhaust is?

A) NO B) CO C) SO2 D) Soot

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Question 735

The carrying capacity of a population is determined by its?

A) population growth rate B) natality C) mortality D) limiting resources

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Question 736

Two opposite forces operate in the growth and development of every population. One of them is related to the ability to reproduce at a given rate. The force opposite to it is called?

A) fecundity B) mortality C) environmental resistances D) biotic control

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Question 737

The concept that 'population tends to increase geometrically while food supply increases arithmetically’ was put forward by?

A) Adam Smith B) Charles Darwin C) Thomas Malthus D) Stuart Mill

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Question 738

In a population, unrestricted reproductive capacity is called as?

A) carrying capacity B) biotic potential C) birth rate D) fertility rate

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Question 739

A human population is small, there is a greater chance of ?

A) gene flow B) genetic drift C) natural selection D) mutation

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Question 740

Exponential growth occurs when there is?

A) a great environmental resistance B) no environmental resistance C) no biotic potential D) a fixed carrying capacity

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