Posts
JOIN MY NEET PAID WHATSAPP TEST GROUP FOR PDF FORMAT TEST WITH ANSWERS
(FEES RS.3000 FOR 1 YEAR)
WHATSAPP – 8056206308 FOR DETAILS
CBSE CLASS 10 & 12 CHAPTER WISE MCQS 2 3 5 MARKS Q ANS PDF MATERIALS AVAILABLE FOR SALES
Q.1 Eltonian pyramids of
numbers are upright in one of the following ecosystem -
(1) Grassland (2) Tree
(3) Pond (4) Both (1) and (3)
Q.2 The type of food
chain in which organic matter decomposed is converted into energy rich
compounds is called -
(1) Detritus food chain
(2) Grazing food chain
(3) Cybernetics
(4) None above
Q.3 One of Eltonian
pyramids have to be upright always -
(1) Biomass (2) Energy
(3) Number (4) All of these
Q.4 Word 'ecosystem' was
coined by -
(1) Elton (2) Tansley
(3) Odum (4) Billing
Q.5 Biotic components
include -
(1) producers only (2)
consumers only
(3) producers and consumers only (4) producers, consumers
and decomposers
Q.6 The last organisms of
the food chain are generally-
(1) photosynthetic plants
(2) herbivores
(3) carnivores
(4) top carnivores
Q.7 In an ecosystem, the
population of -
(1) primary producers is larger than
primary consumers
(2) secondary consumers is largest
(3) primary consumers out numbers
primary producers
(4) primary consumers are least
dependent upon primary producers
Q.8 An aquatic ecosystem
consists of -
(1) biotic factors (2)
biotic and abiotic factors
(3) consumers only (4) producers
only
Q.9 The best arrangement
of an energy system consisting of hawks, snakes, mice and grasses is -
(1) Grass ® mice ®
snake ® hawks
(2) Grass ® snake ®
mice ® hawks
(3) Grass ® mice ®
hawks ® snakes
(4) Mice ® snake ®
hawks ® grass
Q.10 If a big fish eats
small fish which eats Hydra who in turn eats water fleas ; water fleas in turn
eat phytoplankton. In this chain, water fleas will be -
(1) Producers (2) Primary consumers
(3) Secondary consumers (4) Top consumer
Q.11 The graphic
representation of trophic level is represented by a pyramid. Which of the
following pyramid is always a true pyramid unlike the others?
(1) Pyramid of number (2)
Pyramid of biomass
(3) Pyramid of energy (4) Both
(1) and (3)
Q.12 Which of the
following constitutes the structure of an ecosystem?
(1) Ecological community
(2) Quantity and distribution of
abiotic materials
(3) Range of physical conditions
(4) All the above
Q.13 Ecosystem comprises
both abiotic and biotic components. Biotic component of an ecosystem consists
of -
(1) Producers (2) Consumers (3)
Decomposers (4) All the above
Q.14 Autotrophic organisms
(green plants), which capture solar energy to synthesise organic food are
called -
(1) Producers (2) Consumers
(3) Decomposers (4) None of the above
Q.15 In a pyramid of
numbers representing an ecosystem of a large freshwater pond the number of
primary consumers is -
(1) Less than the Top consumers
(2) Less than the secondary
consumers
(3) Less than the producers
(4) Less than the tertiary consumers
Q.16 Food chain refers to
-
(1) A number of human beings forming
a chain for food
(2) The transfer of food energy from
producers to consumers
(3) Animals near a source of food
(4) None of the above
Q.17 The sequence of
species through which the organic molecules in community pass is called is -
(1) Food web
(2) Food chain
(3) Nutrient cycle
(4) Pyramid of energy
Q.18 A group of
interconnected food chains is called -
(1) Pyramid of energy
(2) Food web
(3) Food cycle
(4) Complex food chain
Q.19 The energy which is
utilized by the living world is primarily -
(1) Heat (2) Electricity (3) Light (4)
Kinetic
Q.20 Energy flow in ecosystem is -
(1) Unidirectional (2) Bidirectional
(3) Multidirectional (4) None of the above
Q.21 The rate at which new
tissues are formed in producers is the ecosystem's -
(1) Net primary productivity (2) Gross primary
productivity
(3) Net secondary productivity
(4) Gross secondary productivity
Q.22 How much amount of
light is used in the production process by plants ?
(1) 1 to 5% (2) 5% to 10%
(3) 20 to 40% (4) more than 70%
Q.23 The importance of
ecosystem maintenance lies in -
(1) Cycling of materials
(2) Flow of energy
(3) Both of the above
(4) None of these
Q.24 The amount of energy,
utilized by herbivores from the plants is -
(1) 5% (2) 10% (3) 50% (4) 90%
Q.25 The percentage of net
primary production of total light intake is -
(1) 10% (2) 0.8-4%
(3) 10-20% (4) 15%
Q.26 The flow of materials
and energy in an ecosystem is respectively -
(1) Cyclic only (2) Linear only
(3) Linear and cyclic (4) Cyclic and linear
Q.27 Mark the incorrect
statement with reference to carbon cycle -
(1) Lime rocks contribute to CO2 of water
(2) Atmospheric CO2 gets dissolved in water
(3) CO2 is returned by combustion of fuel
(4) 75% of total carbon lies in
geological component
Q.28 Major reservior of
carbon in biosphere is lies in -
(1) Atmosphere (2) Lithosphere
(3) Hydrosphere (4) All of
these
Q.29 Biogeochemical
cycling means -
(1) Cycling of nutrients in an
ecosystem
(2) Cycling of water
(3) Cycling of energy in an
ecosystem
(4) Cycling of gases between plants
and the atmosphere
Q.30 The least productive
ecosystem is -
(1) Coastal seas (2) Very deep lakes (3) Grasslands (4) Moist forests
Q.31 One of the
following is sedimentary cycle ?
(1)
Carbon (2) Hydrogen
(3)
Nitrogen (4)
Phosphorus
Q.32 The primary consumers
in a pond ecosystem is -
(1) Phytoplankton (2) Zooplankton
(3) Fishes (4) Bacteria
Q.33 The number of primary
producers within a specified area would be minimum in -
(1) Grassland (2) Pond ecosystem (3)
Desert (4)
Forest ecosystem
Q.34 The river mouth ecosystem
is called as -
(1) Estuarine (2) Lotic
(3) Lentic (4) None of these
Q.35 In a natural
ecosystem, decomposers include-
(1) Bacteria and fungi
(2) Parasitic algae
(3) Macroscopic animals
(4) All the above
Q.36 Which of the
following is not true for man madeecosytems ?
(1) They are highly efficient
(2) They lack the diversity of
natural ecosystems
(3) They mainly comprise seasonal
vegetation or one chosen crop.
(4) Parks and aquaria are not
man-made ecosystems.
Q.37 Lotic ecosystem
refers to -
(1) Ecosystem of estuary water
(2) Deep marine-water ecosystem
(3) Ecosystem of flowing water
(4) Static-water ecosystem
Q.38 The ecosystem of a
pond is referred to as -
(1) Lentic (2) Lotic
(3) Xeric (4) Benthic
Q.39 The
correct sequence of components through which energy may pass from initial
source, through an ecosystem is -
(1) Sun
– autotrophs-heterotrophs– environment – space
(2)
Space – environment – heterotrophs
– autotrophs – sun
(3) Sun
– space – environment –
heterotrophs – autotrophs
(4) Sun
– space – environment – autotrophs – heterotrophs
Q.40 The major resorvior
of phosphorous cycle is-
(1) Ocean (2) Rocks
(3) Atmosphere (4) Pollution
Q.41 Efficiency of any
ecosystem is best depicted by pyramid of -
(1) Energy (2) Number
(3) Biomass (4) Volume
Q.42 The correct match is -
(1) Producers-act upon the
decomposed substances and transform them into different forms of inorganic and organic
substances
(2) Consumers-are autotrophic
members of ecosystem
(3) Decomposers-feed upon dead
decaying living organisms and break them into simpler compounds fit for use of
producers
(4) None of these
Q.43 The first trophic level in any kind of food
chain is always a green plant because -
(1) Of their wide distribution
(2) They alone have a capacity to
fixatmospheric CO2, in the
presence/absence of sunlight
(3) Of their richness in chlorophyll
(4) Of their capacity to convert
light energy to chemical energy
Q.44 The creating force of
an any ecosystem is -
(1) Organic fuels, carbohydrates
(2) Biomass
(3) Solar energy
(4) Producers
Q.45 When frog eats
grasshopper which thrives on green plants, the frog is -
(1) Primary producer
(2) Herbivore
(3) Primary carnivore
(4) Top consumer
Q.46 The largest ecosystem
in the world is contributed by -
(1) Forests (2) Rivers
(3) Oceans (4) Grasslands
Q.47 If the primary
producers are absent from any ecosystem which of the following will occur ?
(1) Herbivores will not survive
(2) Carnivores will not survive
(3) Both will be disintegrated
because of food absence
(4) No change will take place
Q.48 Grasshopper in
grassland is a -
(1) Producer (2) Herbivore
(3) Carnivore (4) None of these
Q.49 The pyramid of number
for forest ecosystem is -
(1) Upright (2) Inverted
(3) Both of above (4) None of above
Q.50 They can be put in the category of primary
consumers -
(1) Eagles and tigers
(2) Fishes and whales
(3) Snakes and frogs
(4) insects and cattles
Q.51 The study of fresh
water ecology is -
(1) Hydrology (2) Ecology
(3) Limnology (4) Geology
Q.52 The place where fresh
water joins the salt water is called as -
(1) Island (2) Lagoon
(3) Beach (4) Estuary
Q.53 The word standing
crop in ecosystem refers to -
(1) Living components (2)
Non-living components
(3) Both living and non-living
components (4) None of the above
Q.54 The pyramid of energy
in any ecosystem is-
(1) Always upright
(2) May be upright
(3) Always inverted
(4) None of the above
Q.55 Which of the
following organisms can convert ammonium or nitrates into amino acids ?
(1) Scavengers (2) Producers
(3) Primary consumers (4) Primary detritivores
Q.56 One of the following
is a true micro-ecosystem
(1) One litre of water from a pond
kept in an air tight flask
(2) One litre of tap water in a
flask covered over by cotton plug
(3) Ten litre of boiled pond water
covered over by a lid
(4) One litre of pond water closed
with a cork having gas exchange tube.
Q.57 The decomposers in an
ecosystem constitute the following trophic level -
(1) T1 (2)
T3 (3) T5 (4)
T4
Q.58 If all the green
plants were to disappear from the earth -
(1) All the animal will die
(2) Only the herbivores will die
(3) Only the carnivores will die
(4) It will not matter to any one
because chemosynthetic bacteria will produce food for all
Q.59 The bacteria which
attack the dead animals are -
(1) First link of the food chain and
are known as primary producers
(2) Second link of the food chain
and are herbivorous
(3) Third link of the food chain and
are tertiary consumers
(4) The end of the food chain and
are decomposers
Q.60 The number of
producers and consumers in an ecosystem is mutually controlled by a -
(1) Feed back mechanism
(2) Food chain mechanism
(3) Productivity control
(4) Any of these
Q.61 The non-green plants
are as important as the green plants because they -
(1) Cause human disease
(2) Cause diseases of other plants
(3) Are useful in several industries
(4) Bring about decomposition of
dead animals and plant remains
Q.62 The ecosystem of
earth is known as -
(1) Biome (2) Community
(3) Biosphere (4) Association
Q.63 In any given
ecosystem, the number of individuals of a species remain more or less constant
over a period of time. This constancy of numbers is maintained by -
(1) Parasites (2) Predators
(3) Human beings (4) Available food
Q.64 The ecosystem exists
in a state of 'balance'. Supposing one of the heterotrophs, says the rabbit,
multiplies and increases in number suddenly then -
(1) The balance will be permanently
upset because the rabbits will eat the
grass in the system and die of starvation.
(2) The 'balance' will be restored
by an increase in the wolf population
(3) Epidemics will break out in the
rabbits and kill all of them
(4) Rabbits will starts eating each
other
Q.65 Which of the
following is not characteristic of a ecosystem -
(1) Nutrient cycling (2) Energy flow
(3) Dominant species (4) Decomposition
Q.66 The amount of living
matter present in a component population of a particular trophic level is
called as -
(1) Standing crop (2) Standing quality
(3) Both of these (4) Standing state
Q.67 Which of the
following is the smallest unit ?
(1) Biosphere (2) Ecosphere
(3) Ecosystem (4) Biome
Q.68 The term reducer is
applied to -
(1) Decomposers (2) Detrivores
(3) Both of these (4) Heterotrophs
Q.69 In a parasitic food
chain which trophic level is represented by bugs and lices ?
(1) T4 (2)
T3 (3) T2 (4)
T1
Q.70 The pyramid of number
in a forest ecosystem is -
(1) Rhomboidal (2) Upright
(3) Inverted (4) Linear
Q.71 The pyramid of
biomass in a parasitic ecosystem is -
(1) Upright (2) Inverted
(3) Linear (4) Rhomboidal
Q.72 The pyramid of
biomass in a shallow pond ecosystem is -
(1) Inverted (2) Upright
(3) Rhomboidal (4) Linear
Q.73 The cybernetic of an
ecosystem refers to -
(1) Harvest index
(2) A feed back mechanism
(3) Regulation of equilibrium
(4) Reverse energy flow
Q.74 The gross production
minus respiration losses by plants in an ecosystem is indicated as-
(1) Net production
(2) Secondary production
(3) Net storage
(4) Net primary production
Q.75 The biotic and
abiotic components of the ecosystem are connected through -
(1) Standing quality
(2) Climatic regime
(3) Transducers
(4) Humification and mineralization
Q.76 The rate of storage
at consumer level is -
(1) Secondary productivity
(2) Tertiary productivity
(3) Both of these
(4) Net productivity
Q.77 The CO2 is returned to the atmosphere by-
(1) Metabolism of producers
(2) Metabolism of consumers
(3) Combustion of fuel
(4) All of these
Q.78 A group of
interacting living things and all the environmental factors with which they
interact are together called -
(1) Ecosystem
(2) Succession
(3) Producers
(4) Ecological niche
Q.79 An ecosystem does not
normally alter because it is in a state of -
(1) Deficient light
(2) Imbalance
(3) Homeorhesis
(4) Deficient components
Q.80 The immediate
surroundings of an organism are called -
(1) Macroenvironment
(2) Microenvironment
(3) Biosphere
(4) Both (1) and (2)
Q.81 Raymond Lindmann
(1942) used the term trophic level. Trophic levels are formed by -
(1) Animals only
(2) Plants only
(3) Organisms linked in food chains
(4) Top consumers in food chain
Q.82 Organisms which
acquire energy and nutrients by digesting the organic molecules of living
organisms are called -
(1) Producers (2) Consumers
(3) Detritivores (4) None of the above
Q.83 Which of the
following is the trophic level of man in an ecosystem ?
(1) Omnivore (2) Carnivore
(3) Herbivore (4) Producer
Q.84 The rate at which new
tissues are formed in producers is called the primary net productivity of the
ecosystem. About how much of the net primary productivity of a terrestrial
ecosystem is eaten and digested by herbivores ?
(1) 2% (2) 10% (3) 50% (4) 85%
Q.85 Net community
productivity (NCP) is the -
(1) Total rate of photosynthesis
(2) Chemical energy left after
utilization by plants
(3) Rate of storage of organic
matter not used by heterotrophs
(4) Energy wasted by carnivores
Q.86 A food chain consists
of -
(1) Producers, carnivores and
decomposers
(2) Producers, herbivores and
carnivores
(3) Producers and primary consumers
(4) Producers, consumers and
decomposers
Q.87 The herbivores that
feed directly on producers are called -
(1) Primary consumers
(2) Secondary consumers
(3) Tertiary consumers
(4) Quarternary consumers
Q.88 Within the
ecosystem, energy is transferred from organism to organism in the form of -
(1) Light
(2) Heat
(3) Chemicals
(4) None of the above
Q.89 The rate
at which light energy is converted to chemical energy of organic molecules is
the ecosystem's -
(1) Net primary productivity
(2) Net secondary productivity
(3) Gross primary productivity
(4) Gross secondary productivity
Q.90 Producers
in an ecosystem are -
(1) Green organisms which fix solar
energy by photosynthesis
(2) Aanimals which cause an increase
in biomass
(3) Organisms which can be used as
manure
(4) Animals in the food chain which
produce more energy than they consume
Q.91 The
dominant second trophic level in a lake ecosystem is -
(1) Phytoplankton (2) Zooplankton
(3) Benthos (4) Nekton
Q.92 Which of
the following animals is dominant in desert ecosystem ?
(1) Leopard (2) Lizard
(3) Hyla (4) Tiger
Q.93 Pyramid of
numbers is upright in which of the ecosystems ?
(1) Pond ecosystem (2) Tree ecosystem
(3) Grassland ecosystem (4) Both (1) and (3)
Q.94 The total
amount of living material at various levels of a food chain is depicted by -
(1) Pyramid of numbers
(2) Pyramid of energy
(3) Pyramid of biomass
(4) All the above
Q.95 In the diagram,
different pyramids are shown. Which one is the pyramid of numbers in a
temperate forest ?
(1)
Q.96 Which of these is the
food chain which runs from larger to smaller organisms ?
(1) Grazing food chain
(2) Predator food chain
(3) Saprophytic food chain
(4) Parasitic food chain
Q.97 The type of food
chain in which decomposed organic matter is converted into energy -rich
compounds is called -
(1) Cybernetics
(2) Detritus food chain
(3) Grazing food chain
(4) None of these
Q.98 Biological
equilibrium is equilibrium amongst-
(1) Consumers and decomposers
(2) Producers and consumers
(3) Producers and decomposers
(4) Producers, consumers and
decomposers
Q.99 If we completely
remove the decomposers from an ecosystem, the ecosystem functioning will be
adversely affected because-
(1) Energy flow will be blocked
(2) Rate of decomposition of other components
will be very high
(3) Herbivores will not receive
solar energy
(4) Mineral movement will be blocked
Q.100 Zooplankton includes -
(1) Ciliates (2) Flagellates
(3) Small crustaceans (4) All the above
Q.101 Energy and nutrients enter in a
community by way of the -
(1) Detritivores (2) Producers
(3) Scavengers (4) Consumers
Q.102 Food webs are 3-D web of
interrelations in which several food chains are interlinked. It helps to
provide -
(1) Alternate pathways for flow of
energy
(2) More variety and quality of food
at each trophic level
(3) Stability to ecosystem
(4) All of these
Q.103 Which food chain is directly dependent
upon solar radiations -
(1) Grazing (2) Parasitic
(3) Detritus (4) Both (1) and (3)
Q.104 The most productive ecosystem is -
(1) Temperate forest (2) Coral reef
(3) Estuary (4) Sugarcane field
Q.105 All
ecosystems have no boundary because-
(1) They require minerals for their
functioning
(2) They cannot occur in isolation
(3) The are large in size
(4) They require light from all
sources
Q.106 A ecological pyramid, devised by C.
Elton 1927 ; is a graphic diagram that shows relationship between -
(1) Transfer of food through food
chains
(2) Organisms
(3) Various trophic levels of a food
chain
(4) Populations and communities
within an ecosystem
Q.107 The denitrifying bacteria are -
(1) Micrococcus denitrificans
(2) Pseudomonas
(3) Thiobacillus
(4) All of the above
Q.108 In nitrogen cycle, which of the
following plays an important role ?
(1) Rhizopus (2) Nitrobacter
(3) Mucor (4) All green algae
Q.109 Denitrification is -
(1) Reduction of NO2 to ammonia by bacteria in the soil
(2) Conversion of ammonia to amino
acids
(3) Conversion of ammonia and
nitrates to gaseous nitrogen
(4) Oxidation of ammonia to nitrate
Q.110 Nitrogen cycle involves bacteria
capable of changing proteins to ammonia called as -
(1) Bacteria of decay
(2) Denitrifying bacteria
(3) Nitrogen fixing bacteria
(4) Ammonifying bacteria
Q.111 Ruthless exploitation and pollution of
the environment has increased the
magnitude of waste materials which has disturbed the operations of all
important-
(1) Biomes
(2) Ecosystems
(3) Bio-geo-chemical cycles
(4) All of the above
Q.112 Carbon is available to crop plants in
the form of-
(1) Amino acids (2) Carbon
dioxide
(3) Elemental carbon (4) Carbonates
Q.113 Which of the following contribute to
the carbon cycle ?
(1) Photosynthesis
(2) Respiration
(3) Fossil fuel combustion
(4) All of the above
Q.114 Of more immediate concern regarding
carbon cycle is -
(1) Output rate of carbon locked in
deposits of coal, petroleum and natural gas
(2) Green house gases
(3) Increase in the total mass of
carbon in earth's atmosphere by 12-14%
(4) All of the above
Q.115 The organisms which participate
most actively in nitrogen cycle in
nature are -
(1) Saprophytic angiosperms
(2) Parasitic fungi
(3) Bacteria
(4) Legumes
Q.116 Biogeochemical cycles can be traced in
-
(1) Ecosystems
(2) Biomes
(3) Only water
(4) Both (1) and (2)
Q.117 Hydrological cycle comprises of two
overlapping cycles -
(1) Surface waters and atmospheric
cycles
(2) Oceanic and fresh water cycles
(3) Underground water and
atmospheric cycles
(4) Global and smaller cycles
Q.118 The phosphorus cycle differs from
those of carbon and nitrogen as well as those
of oxygen and hydrogen cycle in that it
lacks-
(1) Water
(2) Dust particles
(3) Gaesous phase
(4) All above
Q.119 Cycling of elements in any ecosystem is
called -
(1) Chemical cycle
(2) Geochemical cycle
(3) Biogeochemical cycle
(4) Geological cycle
Q.120 In India, coniferous forests are found
in –
(1) Rajasthan (2) Satpura Hills (3)
Himalayan region (4) Madhya Pradesh
Q.121 Grassland with scattered trees is
called –
(1) Rain forests (2) Evergreen forest (3) Savannah (4) Deciduous forests
Q.122 Which of the following is predator
(1) Cow (2) Bird
(3)
Insect (4) All
Q.123 In an ecosystem -
(1)
Primary producers are more than primary consumers
(2)
Primary consumers larger than primary producers
(3)
Secondary consumers are larger than primary producers
(4)
Primary consumers are least depend on primary producers
Q.124 Ecosystem term coined by -
(1) Odum (2) Mishra
(3)
Reiter (4) Tensley
Q.125 Large ecosystems are called -
(1)
Biomes (2) Ecotone
(3)
Ecads (4) Biocoenosis
Q.126 "Biocoenosis" name proposed by -
(1)
Tensley (2)
Reiter
(3)
Haeckel (4)
Carl Mobius
Q.127 Vultures in an ecosystem are -
(1) Predators (2)
Scavangers
(3)
Consumers (4) Top carnivores
Q.128 The maximum energy is stored at following
tropical level in any ecosystem -
(1)
Producers (2) Herbvores
(3)
Carnivores (4) Top carnivores
Q.129 The source of energy in an ecosystem is -
(1)
Sunlight (2)
DNA
(3) ATP (4) RNA
Q.130 Ecosystem may be defined as -
(1) A
localized association of several plants and animals
(2)
Different communities of plants, animals and microbes together with their
physico-chemical environment
(3)
Different communities of plants microbes plus their physico-chemical
environment
(4) none
of the above
Q.131 The importance of ecosystem lies in -
(1) Flow
of energy (2) Cycling of materials
(3) Both
the above (4) None of the above
Q.132 Ecosytem is -
(1) Any
functional unit that includes the whole community in a given area interacting
with the abiotic factors
(2) A
group of green plants
(3) A
group of animals interacting with environment
(4) Man
and pets living together
Q.133 In any given ecosystem, number of individuals
in a species remains more or less constant over a period of time. This
constancy of number is maintained by -
(1)
Parasites (2) Predators
(3) Man (4) Available food
Q.134 Who proposed that ecosystem is symbol of structure
& function of nature -
(1)
Gardener (2) Odum
(3)
Tansley (4)
Reiter
Q.135 Largest ecosystem of the world are -
(1)
Forests (2)
Grass lands
(3)
Great lakes (4) Oceans
Q.136 Which of the following is a man made
artificial ecosystem -
(1)
Grassland ecosystem
(2)
Forest ecosystem
(3)
Ecosystem of artificial lakes & dams
(4) None
of these
Q.137 Green plants in a forest ecosystem are -
(1)
Suppliers of food & O2
(2)
Consumers of nutritive materials
(3)
Consumers of animal proteins
(4)
Suppliers of timber
Q.138 A pond is a -
(1) Biome
(2)
Natural ecosystem
(3)
Artificial ecosystem
(4)
Community of plants & animals
Q.139 Nepenthes (Insectivorous pitcher plant) is -
(1)
Producer (2) Consumer
(3) Both
1 & 2 (4) None of these
Q.140 Which one is omnivorous -
(1) Frog
(2) Lion
(3) Deer
(4) Man
Q.141 Which biotic components mainly help in
recycling of minerals -
(1)
Producers (2) Consumers
(3)
Decomposers (4) All the above
Q.142 Trophic levels are formed by -
(1) Only
plants
(2) Only
carnivores
(3) Only
animals
(4)
Organisms linked in food chain
Q.143 In a forest ecosystem green plants are -
(1)
Primary producers
(2)
Consumers
(3)
Primary consumers
(4)
Decomposers
Q.144 In an ecosystem the function of the producers
is to -
(1)
Convert organic compounds into inorganic compounds
(2) Trap
solar energy and convert it into chemical energy
(3)
Utilize chemical energy
(4)
Release energy
Q.145 With regard to ecological food chain, man is
a -
(1)
Consumer
(2)
Producer
(3) Both
consumer & producer
(4)
decomposer
Q.146 A plant, being eaten by a herbivore which in
turn is eaten by a carnivore makes -
(1) Food
chain (2) Web of food
(3)
Omnivores (4) Interdependence
Q.147 When peacock, eats snake which eats insects
depends on green plants, the peacock is -
(1) a
primary consumer
(2) a
primary decomposer
(3) a
final decomposer of plants
(4) the
apex of the food pyramid
Q.148 If we completely remove decomposers from from
an ecosystem, the ecosystem functioning will be adversely affected because -
(1)
Mineral movement will be blocked
(2)
Herviores will not receive solar energy
(3)
Energy flow will be blocked
(4) Rate
of decomposition of other components will be very high
Q.149 Path of energy flow in a n ecosystem is -
(1)
Herbivorous ® producer ®
carnivorous ® decomposer
(2)
Herviorous® carnivorous ® producer ®
decomposer
(3)
Producer ® carnivorous ®
herbivorous ® decomposer
(4)
Producer ® herbivorous ®
carnivorous ® decomposer
Q.150 Science of self control in an ecosystem is called
-
(1)
Synecology (2) Autecology
(3)
Cybernetics (4) Edaphology
Q.151 Pyramids of energy are -
(1)
Always upright (2) Always inverted
(3)
Mostly upright (4) Mostly inverted
Q.152 The ecological pyramid of numbers in pond
ecosystem is -
(1)
Upright (2)
inverted
(3) May
upright or Inverted (4) First upright then inversed
Q.153 An ecosystem resists change because it is in
a state of -
(1)
Homeorhesis (2) Regular Illumination
(3)
Static Imbalance (4) Food accumulation
Q.154 What is true about any ecosystem -
(1) It
is self regulatory
(2) It
is self sustained
(3) Top
carnivores have climax tropic level position
(4) All
Q.155 The Pyramid of numbers in grassland ecosystem
will be -
(1) Up
right (2)
Inverted
(3)
Irregular (4)
Linear
Q.156 Pyramid of number is inverted in case of -
(1) Pond
ecosystem
(2)
Desert ecosystems
(3)
Grassland ecosystem
(4)
Forest ecosystem
Q.157 The number of primary producers in a
specified area would be maximum in -
(1) Pond
ecosystem
(2)
Grassland ecosystem
(3)
Forest ecosystem
(4)
Desert ecosystem
Q.158 Which ecosystem has maximum number of
producers in an unit area -
(1) Pond
(2) Grassland
(3)
Forest (4)
Tundra
Q.159 The storage of energy of consumer level is
known as -
(1)
Grass primary production
(2)
Secondary productivity
(3) Net
primary productivity
(4) Net
productivity
Q.160 Gross primary productivity is -
(1) Rate
at which organic molecules are formed in an autotroph
(2) Rate
at which organic molecules are used up by an autotroph
(3)
Storage of organic molecules in the body of an autotroph
(4) Rate
at which organic molecules are transferred to next higher trophic level
Q.161 Carbon cycle includes (the following is a
logical sequence) -
(1)
Producer – consumer – decomposer
(2)
Decomposer – consumer – producer
(3)
Producer – decomposer – consumer
(4)
Consumer – producer – decomposer
Q.162 The bulk of nitrogen in nature is fixed by -
(1)
Lightening
(2)
Chemical industries
(3)
Denitrifying bacteria
(4)
Symbiotic bacteria
Q.163 The flow of materials from non living
components to living components and back to the non living components in a more
or less cyclic manner is called a -
(1)
Gaseous cycle
(2)
Sedimentary cycle
(3)
Biogeochemical cycle
(4)
Hydrologic cycle
Q.164 Hydrological cycle is controlled by -
(1)
Grasslands (2) Forests
(3)
Planktons (4) Epiphytes
Q.165 The plant parts when fully decomposed by
microogranism& mixed in the soil is called -
(1)
Litter (2) Duff
(3) Mull
(4) All
Q.166 Temperate evergreen forests in India found in
-
(1)
Himalaya (2) W. Bengal
(3)
Andman (4)
Rajasthan
Q.167 Which biome refers to artic desert -
(1)
Tundra (2)
Taiga
(3)
Savannah (4) Thar desert
Q.168 Which biome is most rich in fauna and flora -
(1)
Deciduous forests
(2)
Chaparral
(3)
Tropical rain forests
(4)
Taiga
Q.169 Autumn colouration of leaves appear only in -
(1)
Tropical regions
(2)
Evergreen plants
(3)
Temperate decidous plants
(4)
deserts
Q.170 In india the temperate evergreen type of
vegetation is found mostly in -
(1)
Western Himalayas above 3,500 Meter
(2)
Estern and western Himalayas less than 3,500 Meter
(3)
Rajasthan and South Punjab
(4)
Western ghats and Assam
Q.171 What determines the boundries of a biome
(1)
Temperature & rain fall
(2) Type
of soil & presence of barrier
(3)
Altitude & latitude
(4) All
the above
Q.172 Which of the biomes axhibit distinct
stratification into stories -
(1)
Tundra biome (2)
Temperate biome
(3)
Tropical rain forest biome (4) Chapparal biome\
Q.173 Veldts of Africa & Pampas of south
America are -
(1) Rain
forest biomes
(2)
Chaparral biomes
(3)
Temperate biomes
(4)
Grassland biomes
Q.174 Savannahs are -
(1)
Tropical rain forest
(2)
Desert
(3)
Grassland with scattered trees
(4)
Dense forest with close canopy
Q.175 All the living organisms and non-living factors
of the earth constitute -
(1)
Biosphere (2) Community
(3)
Biome (4) Association
Q.176 The term biosphere is used for the zone of
the earth where life exists -
(1) On
the lithospere
(2) In
the hydrosphere
(3) In
the lithosphere and hydropshere
(4) In
the lithosphere, hydrosphere and atmosphere
Q.177 When Biosphere turns into human dominated
evironment it is called -
(1)
Noosphere (2) Troposphere
(3)
Mesophere (4) Man sphere
Q.178 A biosphere is composed of -
(1)
Living organisms
(2) Living
organisms + Lithosphere
(3)
Living organisms + lithosphere + atmosphere
(4)
Living organisms + lithosphere + atmosphere + hydrosphere
Q.179 Rhododendron is characteristic vegetation of
-
(1)
Tropical region (2) Mangrove
(3)
Alpine (4) Epiphytes
THANKS FOR READING MY POSTS. FOLLOW MY BLOG AND SHARE YOUR FRIENDS