Tag: natural resources and agriculture

Quizzes (24) Questions (34)

Questions Related to natural resources and agriculture

Multiple choice zoology natural resources and agriculture pollution of soil degradation of land damaging the forests

The type of pollution which is found the third most is

  1. Land or landscape pollution

  2. Controlled tipping

  3. Noise pollution

  4. UV pollution
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The three main types of pollution are 1. Air Pollution 2. Water Pollution 3. Soil Pollution. Rapid urbanization, with the consequent increase in population and building construction, has resulted in the reduction of land for the wastes to be disposed of.

Every year solid wastes are increasing tremendously all over the world. Several hazardous chemicals and the mountains of wastes are ultimately dumped on the land. For example sources of soil, pollution is 
1. Industrial wastes, 2. Urban wastes, 3. Radioactive pollutants, 4. Agricultural practices, 5. Biological agents, 6. Soil sediments.
So the correct answer is 'Land or landscape pollution'.

Multiple choice zoology natural resources and agriculture pollution of soil degradation of land damaging the forests

Taungya is practice of

  1. Shifting cultivation

  2. Agroforestry

  3. Production forestry

  4. Both A and B
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Taungya is practice of shifting cultivation and agroforestry. If is a form of agroforestry system. In this, the villagers are given the right to cultivate short term crops during the early stages of forest plantation establishment. This is continued until trees shade crops due to canopy closure. This is done to utilize the land, control weeds, generate extra income.

Thus, the correct answer is 'Both A and B.'

Multiple choice zoology natural resources and agriculture pollution of soil degradation of land damaging the forests

An agroforestry, taungya consists of

  1. Growing crops in between rows of trees

  2. Growing crops after removal of trees

  3. Growing trees on degraded soils

  4. All of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Taungya system is a form of agroforestry system in which short term crops are grown in the early years of the plantation of a woody perennials species in order to utilize the land, control weeds, reduce establishment costs, generate early income and stimulate the development of the woody perennial species.

So, the correct answer is 'Growing crops in between rows of trees'

Multiple choice biology natural resources and agriculture effects of water pollution effect of water pollution water pollution and its control

Measurement of the rate of oxygen consumption in unit volume of water over a period of time is done to find out

  1. Biogas generation

  2. Biological oxygen demand

  3. Biosynthetic pathways

  4. Fermentation
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Decomposition of organic matter by microbes requires oxygen. Degree of impurity of water due to organic matter is measured in terms of 'Biological Oxygen Demand (BOD)'. BOD is the oxygen in milligrams required for 5 days in 1 litre of water at 20 degree centigrades for the microorganisms to metabolise organic wastes.

Multiple choice biology natural resources and agriculture effects of water pollution effect of water pollution water pollution and its control

Biological Oxygen Demand (BOD) is a measure of

  1. Industrial wastes poured into water bodies.

  2. Extent to which water is polluted with organic compounds.

  3. Amount of carbon monoxide inseparably combined with haemoglobin.

  4. Amount of oxygen needed by green plants during night.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Decomposition of organic matter by microbes requires oxygen. Degree of impurity of water due to organic matter is measured in terms of Biochemical oxygen demand or (BOD). BOD is the oxygen required by microorganisms to completely metabolise organic wastes present in water.

Multiple choice biology natural resources and agriculture effects of water pollution effect of water pollution water pollution and its control

Huge quantity of sewage is dumped in a river. The BOD will.

  1. Increase

  2. Decrease

  3. Slightly decrease

  4. Remain unchanged
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A huge quantity of sewage increases Organic matter in the river water.

The oxygen demand by bacteria to degrade the organic matter increases.
The biological oxygen demand increases.
So, the correct option is 'Increase'.

Multiple choice biology natural resources and agriculture effects of water pollution effect of water pollution water pollution and its control

Biochemical oxygen demand measures

  1. Industrial pollution

  2. Air pollution

  3. Dissolved oxygen required for decomposers

  4. Pollution capacity of effluents
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Biochemical oxygen demand or BOD is the amount of oxygen required to decompose organic matter in one litre of polluted water.
If the water is more polluted, more will be the BOD because more will be the organic matter present in it and hence, more oxygen will be required to decompose it.
So, BOD measures the amount of dissolved oxygen required for decomposers to decompose the organic matter in the water.
So, the correct answer is 'Dissolved oxygen required for decomposers'.
Multiple choice biology natural resources and agriculture effects of water pollution effect of water pollution water pollution and its control

Multiple Choice Questions
Biochemical oxygen demand may not be good index for water bodies receiving effluents from.

  1. Sugar industry

  2. Domestic sewage

  3. Dairy industry

  4. Petroleum industry
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Biochemical Oxygen Demand or BOD is the amount of dissolved oxygen in a water body, required by microorganisms for the aerobic breakdown of organic matter in the water. Petroleum waste consists of inorganic constituents that also may cut off the oxygen supply into the water body thus BOD may not be a good index for water receiving effluents containing it.

So, the correct option is 'petroleum industry'.

Multiple choice biology natural resources and agriculture manure manures and fertilisers role of organic manures in soil management

When a fertilizer contains at least two or more nutrients is called as _____ fertilizer.

  1. Simple

  2. Complex

  3. Chemical

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Complex fertilizers (also known as compound fertlizers) are made from mixing two or more of macro-nutrient type fertilizers. They may also be further blended with elements that provide some of the less-common plant nutrients (known as secondary or trace nutrients, such as sulfur, calcium and magnesium).

Thus, the correct answer is option B.