91.
Which ecosystem has maximum number of producers in an unit area
A
Pond
B
Grassland
C
Forest
D
Tundra
Answer :
Pond
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92.
Water is a resource
A
nondegradable nonmaintainable
B
degradable maintainable
C
renewable
D
non-renewable
Answer :
renewable
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93.
Pyramids of biomass in pond ecosystem is
A
Inverted
B
Upright
C
Linear
D
Irregular
Answer :
Inverted
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94.
Animal protected n Kaziranga National park is
A
Tiger
B
Lion
C
Elephant
D
Rhinoceros
Answer :
Rhinoceros
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95.
Ultraviolet radiations from sunlight causes a reaction that produces
A
Fluorides
B
Carbon monoxide
C
Sulphur dioxide
D
Ozone
Answer :
Ozone
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96.
If the Bengal Tiger becomes extinct
A
Hyenas and wolves will become scare
B
The wild areas will be safe for man and domestic animals
C
Its gene pool will be lost for ever
D
The populations of beautiful animals like deers will get stabilised
Answer :
Its gene pool will be lost for ever
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97.
Which ecological pyramid can never occur in an inverted form
A
Pyramid of number
B
Pyramid of biomass
C
Pyramid of energy
D
Pyramid of species riches
Answer :
Pyramid of energy
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98.
What is phytotron
A
A device to grow the plants in controlled environment
B
Growing plants in green house.
C
Radiation chamber to induce the mutations
D
Apparatus to study the effect of light of plants
Answer :
A device to grow the plants in controlled environment
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99.
Peacock eats a snake and snake eats frog and frog eats insect while insect eats green plant, then position of peacock is
A
Primary producer
B
Secondary producer
C
Decomposer
D
Top at the apex of food pyramid
Answer :
Top at the apex of food pyramid
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100.
Velamen tissue is found in
A
Mesophytes
B
Epiphytes
C
Hydrophytes
D
Xerophytes
Answer :
Epiphytes
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