Environment and Ecology UPSC Syllabus. We covered all the Environment and Ecology UPSC Syllabus in this post for free so that you can practice well for the exam.
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MCQ on Environment and Ecology for UPSC Students
The primary source of energy in eco-body is ………
(a) the energy emitted by fermentation
(b) preserved vegetable sugar
(d) None of the above
Which of the following is not a biotic component of an ecosystem?
(a) Air
(b) Plant
(c) Bacteria
(d) Animals
Option a – Air
Transfer of energy from one organism to another in an ecosystem takes place in an
(a) linear manner
(b) hierarchical manner
(c) discrete manner
(d) cyclic manner
Option d – cyclic manner
Which of the following statement is correct?
(a) The energy flow in the biospheric ecosystem is unidirectional.
(b) The energy flow in the biospheric is cyclical.
(c) Relative loss of energy in the natural ecosystem decrease with increasing trophic levels.
(d) Species at progressively higher trophic levels appear to be less efficient in using available energy.
Option d – Species at progressively higher trophic levels appear to be less efficient in using available energy
In the context of ecosystem productivity, marine upwelling zones are important as they increase marine productivity by bringing the I. decomposer micro-organisms to the surface. II. nutrients to the surface. III. bottom-dwelling organisms to the surface. Select the correct answer using the codes given below
(a) I and II
(b) Only II
(c) II and III
(d) Only III
Option c – II and III
Consider the following statement regarding the ecosystem. I. AG Tansley had used the word ecosystem for the first time. II. The organisms producing their own food are called Autotrophs. their food III. The consumers prepare with the help of photosynthesis. IV. Decomposers convert inorganic material into organic one. Which of the statements given above is correct?
(a) I and II
(b) II and III
(c) II and IV
(d) III and IV
Option a – I and II
The actual location or place where called an organism lives is
(a) habitat
(b) ecosystem
(c) niche
(d) biome
Option a – habitat
The movement of nutrient elements through the various components of an ecosystem is called
(a) Bio-geo-chemical cycle
(b) Bio-geological cycle
(c) Ecological succession
(d) Biological cycle
Option a – Bio-geo-chemical cycle
Which one of the following ecosystems covers the largest areas of the earth’s surface?
(a) Desert ecosystem
(b) Grassland ecosystem
(c) Mountain ecosystem
(d) Marine ecosystem
Option d – Marine ecosystem
Which one of the following is the correct sequence of ecosystems in the order of decreasing productivity?
(a) Oceans, lakes, grasslands, mangroves
(b) Mangroves, oceans, grasslands, lakes
(c) Mangroves, grasslands, lakes, oceans
(d) Oceans, mangroves, lakes, grasslands
Option c – Mangroves, grasslands, lakes, oceans
NPP (Net Primary Productivity) is highest for
(a) tropical forests
(b) swamps
(c) reefs
(d) woodland and shrubland
Option a – tropical forests
An example of a ‘Lentic Habitat’ in the freshwater community is
(a) ponds and swamps
(b) waterfalls and rivers
(c) ponds and rivers
(d) All of the above
Option a – ponds and swamps
Which one among the following covers the highest percentage of forest area in the world?
(a) Temperate Coniferous Forests
(b) Temperate Deciduous Forests
(c) Tropical Monsoon Forests
(d) Tropical Rain Forests
Option d – Tropical Rain Forests
Most of the desert plants bloom during the night because
(a) their blooming is controlled by low temperatures.
(b) they are sensitive to the phase of the moon.
(c) the desert insects eat away flowers during day time.
(d) the desert insects are active during nighttime.
Option d – the desert insects are active during nighttime
(a) the growth of plants without soil.
(b) growth of plants without water.
(c) conservation of water.
(d) relation of sound with water.
Option a – the growth of plants without soil
Which among the following is the most stable ecosystem?
(a) Ocean
(b) Forest
(c) Mountain
(d) Desert
Option a – Ocean
Which one of the following is the largest ecosystem in the world?
(a) Ocean
(b) Grassland
(c) Forest
(d) Mountain
Option a – Ocean
Which of the following is an artificial ecosystem?
(a) Ponds
(b) Field
(c) Forests
(d) None of these
Option b – Field
Which one of the following is the best description of the term ecosystem?
(a) A community of organisms interacting with one another.
(b) That part of the Earth is inhabited by living organisms.
(c) A community of organisms together with the environment in which they live.
(d) Flora and fauna of a geographical area.
Option c – A community of organisms together with the environment in which they live
The rapid rate of decline in the vulture population in India is mainly due to
(a) the overuse of diclofenac drug
(b) the low death rate of animals.
(c) the high death rate of animals.
(d) cleanliness
Option a – the overuse of diclofenac drug
Which one of the following is not a major cause of Wildlife Extinction?
(a) Loss of natural habitat.
(b) To make a fire in the forest.
(c) Illegal commercial trade of wildlife.
(d) The fast pace of population growth.
Option d – The fast pace of population growth
The functioning of an ecosystem involves
(a) the flow of energy and the circulation of nutrients.
(b) an increasing simplicity of relations.
(c) increasing animal populations.
(d) an increasing number of trees, bushes, etc.
Option a – the flow of energy and the circulation of nutrients
All components and individuals in an ecosystem are
(a) individualistic
(b) independent
(c) interdependent
(d) dispensable
Option c – interdependent
Which one of the following organisms represents the primary consumer category in an ecosystem?
(a) Caterpillar
(b) Crab apple tree
(c) Frog
(d) Sparrowhawk
Option a – Caterpillar
Which among the following is correct regarding the ecosystem?
(a) Primary consumers are least dependent upon producers.
(b) Primary consumers out-number producers.
(c) Producers are more than primary consumers.
(d) Secondary consumers are the largest and most powerful.
Option c – Producers are more than primary consumers
We covered all the environment and ecology upsc syllabus above in this post for free so that you can practice well for the exam.
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