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Science Write the Correct Alternative.

Energy Flow in an Ecosystem · Maharashtra Board STD 9 (MSBSHSE - English Medium). 44 questions.

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44 questions · timed · auto-graded

MCQ 11 Mark
Oxygen is released into the atmosphere by the process of
  • A
    respiration
  • ✓
    Photosynthesis
  • C
    Combustion
  • D
    All of these
Answer
Correct option: B.
Photosynthesis
Photosynthesis
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MCQ 21 Mark
first proposed the concept of the Ecological Pyramid in 1927.
  • ✓
    Charles Elton
  • B
    Lindeman
  • C
    Eichler
  • D
    John Muir
Answer
Correct option: A.
Charles Elton
Charles Elton
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MCQ 41 Mark
After the death of apex consumers, energy becomes available to
  • A
    Primary consumer
  • B
    Secondary consumer
  • ✓
    Decomposer
  • D
    Sun
Answer
Correct option: C.
Decomposer
Decomposer
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MCQ 51 Mark
in 1942 studied the food chain and energy flow through it.
  • A
    Charles Elton
  • ✓
    Lindeman
  • C
    Robert Whittaker
  • D
    Eichler
Answer
Correct option: B.
Lindeman
Lindeman
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MCQ 61 Mark
Charles Elton studied the of the Beer islands in England..
  • ✓
    Tundra ecosystem
  • B
    Mediterranean ecosystem
  • C
    Equatorial ecosystem
  • D
    Taiga ecosystem
Answer
Correct option: A.
Tundra ecosystem
Tundra ecosystem
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MCQ 71 Mark
Oxygen is released into the atmosphere by the process of
  • ✓
    Photosynthesis
  • B
    Respiration
  • C
    Oxidation
  • D
    Decomposition
Answer
Correct option: A.
Photosynthesis
Photosynthesis
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MCQ 81 Mark
is an accumulation of the main abiotic gaseous nutrient materials found in the earth’s atmosphere.
  • ✓
    Gaseous cycle
  • B
    Water cycle
  • C
    Solar cycle
  • D
    Lunar cycle
Answer
Correct option: A.
Gaseous cycle
Gaseous cycle
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MCQ 91 Mark
The cyclical flow of nutrients within an ecosystem is called
  • A
    Biological cycle
  • B
    Chemical cycle
  • C
    Solar cycle
  • ✓
    Bio-geo chemical cycle
Answer
Correct option: D.
Bio-geo chemical cycle
Bio-geo chemical cycle
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MCQ 101 Mark
The flow of nutrients in an ecosystem is
  • A
    Non- cyclic
  • B
    Mono directional
  • C
    Reverse directional
  • ✓
    Cyclical
Answer
Correct option: D.
Cyclical
Cyclical
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MCQ 111 Mark
Decomposers dissipate some amount of energy in the form of
  • A
    Light
  • B
    Electricity
  • C
    Sound
  • ✓
    Heat
Answer
Correct option: D.
Heat
Heat
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MCQ 121 Mark
Many food chains interconnected at various levels is called
  • A
    Links
  • B
    Internet
  • C
    Connectors
  • ✓
    Food web
Answer
Correct option: D.
Food web
Food web
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MCQ 131 Mark
Interactions between producers, consumers and saprophytes in a definite sequence is called
  • A
    Links
  • B
    Internet
  • ✓
    Food chain
  • D
    Connectors
Answer
Correct option: C.
Food chain
Food chain
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MCQ 141 Mark
is produced from oxygen through various atmospheric processes.
  • A
    Nitrogen dioxide
  • B
    Nitrites
  • ✓
    Ozone
  • D
    CFC
Answer
Correct option: C.
Ozone
Ozone
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MCQ 151 Mark
Ecological Pyramid is called
  • A
    Hills
  • B
    Mounts
  • ✓
    Eltonian
  • D
    Darwinism
Answer
Correct option: C.
Eltonian
Eltonian
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MCQ 161 Mark
first proposed the concept of Ecological Pyramid in 1927.
  • A
    Darwin
  • B
    Newton
  • ✓
    Elton
  • D
    Edison
Answer
Correct option: C.
Elton
Elton
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MCQ 171 Mark
Most organisms cannot use the free form of
  • A
    Oxygen
  • ✓
    Nitrogen
  • C
    Carbon dioxide
  • D
    Carbon monoxide
Answer
Correct option: B.
Nitrogen
Nitrogen
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MCQ 191 Mark
is used up in the processes like respiration, combustion, decomposition, corrosion, rusting, etc.
  • A
    Nitrogen
  • ✓
    Oxygen
  • C
    Argon
  • D
    Helium
Answer
Correct option: B.
Oxygen
Oxygen
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MCQ 201 Mark
Carnivores feed upon
  • A
    Decomposers
  • ✓
    Herbivores
  • C
    Producers
  • D
    Secondary producers
Answer
Correct option: B.
Herbivores
Herbivores
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MCQ 211 Mark
Plants convert carbon dioxide into by the process of photosynthesis.
  • ✓
    Carbohydrates
  • B
    Proteins
  • C
    Fats
  • D
    Vitamins
Answer
Correct option: A.
Carbohydrates
Carbohydrates
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MCQ 221 Mark
Green plants of the ecosystem store in the form of food.
  • ✓
    Solar energy
  • B
    Chemical energy
  • C
    Thermal energy
  • D
    Electrical energy
Answer
Correct option: A.
Solar energy
Solar energy
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MCQ 231 Mark
fter the death of apex consumers, energy becomes available to.
  • ✓
    Decomposers
  • B
    Producers
  • C
    Herbivores
  • D
    Carnivores
Answer
Correct option: A.
Decomposers
Decomposers
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MCQ 241 Mark
in 1942 studied the food chain and energy flow through it
  • ✓
    Linderman
  • B
    Darwin
  • C
    Calypso
  • D
    Chu win lee
Answer
Correct option: A.
Linderman
Linderman
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MCQ 251 Mark
Carbon dioxide is released into the atmosphere through
  • A
    burning of fossil fuels
  • B
    volcanic activity
  • C
    respiration
  • ✓
    all of these
Answer
Correct option: D.
all of these
all of these
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MCQ 261 Mark
Tiger is a /an
  • A
    Producer
  • B
    Primary consumer
  • ✓
    Apex consumer
  • D
    Secondary consumer
Answer
Correct option: C.
Apex consumer
apex consumer
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MCQ 311 Mark
Oxygen is released in the process of
  • A
    Respiration
  • B
    Decomposition
  • C
    Combustion
  • ✓
    Photosynthesis
Answer
Correct option: D.
Photosynthesis
photosynthesis
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MCQ 321 Mark
The Indian Institute of Ecology and Environment, Delhi, has published
  • A
    Invasive species in a changing Environment
  • ✓
    Encyclopaedia of Ecology and Environment
  • C
    Environment and Ecology Magazine
  • D
    Biodiversity and Disaster Management
Answer
Correct option: B.
Encyclopaedia of Ecology and Environment
Encyclopaedia of Ecology and Environment
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MCQ 331 Mark
Flow of energy in an ecosystem is
  • A
    cyclical
  • B
    two way transport
  • ✓
    one way transport
  • D
    to and fro transport
Answer
Correct option: C.
one way transport
one way transport
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MCQ 341 Mark
is the most important source of energy in any ecosystem.
  • ✓
    The Sun
  • B
    The Moon
  • C
    Producers
  • D
    Decomposers
Answer
Correct option: A.
The Sun
The Sun
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MCQ 351 Mark
Amount of matter and energy from the lowest level to the highest level.
  • ✓
    decreases
  • B
    increases
  • C
    remains the same
  • D
    multiplies
Answer
Correct option: A.
decreases
decreases
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MCQ 361 Mark
is an important component of proteins and nucleic acids.
  • A
    Carbon
  • ✓
    Nitrogen
  • C
    Phosphorus
  • D
    Oxygen
Answer
Correct option: B.
Nitrogen
Nitrogen
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MCQ 371 Mark
The conversion of nitrogen compounds into gaseous nitrogen is called
  • A
    Nitrogen fixation
  • ✓
    Denitrification
  • C
    Ammonification
  • D
    Nitrification
Answer
Correct option: B.
Denitrification
denitrification
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MCQ 381 Mark
Conversion of ammonia into a nitrite and then nitrate is called
  • A
    Nitrogen fixation
  • B
    Denitrification
  • ✓
    Nitrification
  • D
    Ammonification
Answer
Correct option: C.
Nitrification
nitrification
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MCQ 391 Mark
Carbon atoms are circulated and recycled through
  • A
    Nitrification and denitrification
  • ✓
    Photosynthesis and respiration
  • C
    Respiration and nitrification
  • D
    Photosynthesis and ammonification
Answer
Correct option: B.
Photosynthesis and respiration
photosynthesis and respiration
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MCQ 401 Mark
The pattern of energy exchange in an ecosystem is called a
  • A
    Food chain
  • B
    Food web
  • ✓
    Pyramid of energy
  • D
    Trophic levels
Answer
Correct option: C.
Pyramid of energy
Pyramid of energy
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MCQ 411 Mark
Microbes which do not need oxygen are called
  • A
    Producers
  • B
    Aerobes
  • ✓
    Anaerobes
  • D
    Decomposers
Answer
Correct option: C.
Anaerobes
anaerobes
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MCQ 431 Mark
Fungi and other microbes are called
  • A
    Producers
  • B
    Consumers
  • ✓
    Decomposers
  • D
    Omnivores
Answer
Correct option: C.
Decomposers
decomposers
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MCQ 441 Mark
An intricate network of food chains is called
  • A
    Biosphere
  • ✓
    Food web
  • C
    Energy pyramid
  • D
    Ecosystem
Answer
Correct option: B.
Food web
food web
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