Biology Ch 13 Class 12 Man and His Environment

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Study of environmental relations is called:

NUMS 2018
Biology
Man and His Environment
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Conversion of ammonium into nitrates is:

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The position of an organism in a food chain of an ecosystem called:

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An area previously supporting life is made barren, the subsequent recolonization is called ______.

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Overgrazing results in:

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Which of the following statements is true about Savannah?

NTS 2015 DUHS and JSMU
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Man and His Environment
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Which of the following describes an ecological niche?

NTS 2015 SMBBMC
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The animals that feed on organic debris from decomposing plants and animals are called:

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Wild life refers to

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The productivity of aquatic ecosystem is determined by:

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Hot substance is escaped from inside the earth in the form of

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Grassland of Argentina is:

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Endangered species are

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Driving force for all the cycles in ecosystem is

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Geothermal energy is

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When resources gets scarce, the population growth?

PMC Practice 1
Biology
Man and His Environment
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Which of the following trophic levels has the largest biomass in ecosystems?

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In air nitrogen is

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In nitrogen fixation, nitrogen is converted to:

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Process that supplies food to living things through decaying and decomposition is called

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Which of the following is not correct for food web?

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Greenhouse gases are those that:

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Tides are caused by

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Which statement is true?

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Water constitutes –% of body weight?

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In oceans of tropical regions

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Balance in the nutrient cycle can be upset when

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Which one is a non-renewable resource?

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The actual or preserved remains of the organisms that lived in the ancient past are called:

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Study of human population and things that affect them is

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Total area of the world under cultivation is

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In air % of oxygen and carbon dioxide is

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Hydroelectricity is generated by using ______ of falling water.

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Process ensuring the survival of species over long periods of time, even though individual members of the species die.

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In a forest, there are a lot of plants; trees, shrubs, and herbs. What will the Palm trees face if they grow in the same forest?

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Wind blows from area of

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Flow of energy in an ecosystem is:

NUMS 2014
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Man and His Environment
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