Ecology and Environment Vision IAS. We covered all the Ecology and Environment Vision IAS in this post for free so that you can practice well for the exam.
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MCQ on Ecology and Environment Vision for IAS Students
Who among the following propounded the 10 percent law?
(a) Raymond Lindeman
(b) Tansley
(c) Arne Naess
(d) Grinnell
Option a – Raymond Lindeman
(a) the transfer of energy as food from one tropic level to another.
(b) transfer of heat from one matter to another.
(c) transfer of birds from one zone to another.
(d) transfer of water from one zone to another.
(e) None of the above
The cycling of elements in an ecosystem is called
(a) chemical cycle
(b) biogeochemical cycle
(c) geological cycle
(d) geochemical cycle
Option b – biogeochemical cycle
The minimum area of land required to completely sustain the life of the person is called his
(a) biota
(b) ecological footprint
(c) biome
(d) niche
Option b – ecological footprint
The measurement unit of ecological footprint is
(a) global hectare
(b) Nanometer
(c) Hoppus cubic foot
(d) Cubic ten
Option a – global hectare
A biological community in its environment such as a pond, an ocean, a forest, or even an aquarium is known as
(a) biome
(b) community
(c) abiotic environment
(d) ecosystem
Option a – biome
The mechanism of the Ecosystem involves
(a) energy flow
(b) biogeochemical cycle
(c) Both (a) and (b)
(d) None of the above
Option c – Both (a) and (b)
The pyramid of biomass will be inverted in the ecosystem of
(a) forests
(b) ponds
(c) grasslands
(d) drylands
Option b – ponds
The ecological pyramid that is always upright is
(a) the pyramid of energy
(b) the pyramid of biomass
(c) the pyramid of numbers
(d) None of the above
Option a – the pyramid of energy
If the amount of energy or biomass or the population of organisms at successive trophic levels is plotted as horizontal bars above the other, it produces an
(a) square shape
(b) rectangular shape
(c) pyramidal shape
(d) highly irregular shape
Option c – pyramidal shape
The ecological pyramid of numbers or biomass has a lesson for us that we should have …… food habits.
(a) non-vegetarian
(b) vegetarian
(c) high consumption
(d) intensive
Option b – vegetarian
Why are trophic levels in the shape of pyramids?
(a) Due to loss in energy between the trophic level.
(b) Due to the transfer of heat.
(c) Due to the increase of energy between the trophic level.
(d) Due to stable energy between the trophic level.
Option a – Due to loss in energy between the trophic level
Consider the following statements regarding ecological pyramids. I. It was propounded by Charles Elton in 1927. II. It shows the relationship between primary producers and consumers in the context of a number of biomass and energy. Which among the above-given statements is/are incorrect?
(a) Only I
(b) Only II
(c) Both I and II
(d) Neither I nor II
Option d – Neither I nor II
In a food chain, man is
(a) producer
(b) only primary consumer
(c) only secondary consumer
(d) primary as well as a secondary consumer
Option d – primary as well as a secondary consumer
Among the biotic components of the ecosystem, the producer system is
(a) cow
(b) peacock
(c) tiger
(d) green plants
Option d – green plants
In the marine environment, the main primary producers are
(a) Phytoplanktons
(b) Seaweeds
(c) Marine angiosperms
(d) Aquatic bryophytes
Option a – Phytoplanktons
In a food chain, the solar energy utilized by plants is only
(a) 10%
(b) 0.01%
(c) 0.1%
(d) 1%
Option a – 10%
The food chain is a
(a) relationship between autotrophic organisms.
(b) exchange of genetic material between two organisms.
(c) passage of food (and thus energy) from one organism to another.
(d) modern entrepreneur establishment providing food outlets.
Option c – passage of food (and thus energy) from one organism to another
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. Which of the statements given above is/are correct?
(a) I and II
(b) Only II
(c) II and III
(d) Only III
Option b – Only II
Who among the following first enunciated the concept of ecological pyramids in 1927?
(a) Griffith Taylor
(b) Charles Elton
(c) Ratzel
(d) None of the above
Option b – Charles Elton
How many types of ecological pyramids are there?
(a) One
(b) Two
(c) Three
(d) Four
Option c – Three
If a tropical rainforest is removed, it does not regenerate quickly as compared to a tropical deciduous forest. This is because
(a) the soil of rainforests is deficient in nutrients.
(b) propagules of the trees in a rainforest have poor viability.
(c) the rainforest species are slow growing.
(d) exotic species invade the fertile soil of rainforest.
Option a – the soil of rainforests is deficient in nutrients
In dry regions, the leaf size of a tree becomes smaller. It is so to
(a) reduce metabolism
(b) reduce transpiration
(c) maintain natural growth
(d) protect plants from animals
Option b – reduce transpiration
Arrange the following ecosystem in order of their decreasing productivity with the help of codes given below. I. Desert II. Grassland III. Ocean IV. Swamp V. Tropical Moist Deciduous Forest VI. Tropical Forest Codes
(a) VI, V, IV, II, III, I
(b) VI, IV, III, II, I, V
(c) IV, III, II, V, I, VI
(d) I, III, IV, II, V, VI
Option a – VI, V, IV, II, III, I
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