The most polluted city in the world is
Tokyo
New York
Calcutta
Mexico
Correct Answer :
A. Tokyo
Related Questions
Which of the following atmospheric pollutants is not produced by the exhaust of motor vehicles in Delhi
Fly ash
Hydrocarbon gases
CO
One always finds many more of the prey species than of the predator. This is called a
food web
pyramid of numbers
pyramid of succession
none of these
Which one is the direct ecological factor ?
Soil structure
Wind
Temperature
Climate
An association between two or more species in which both are benefited is known as
commensalism
symbiosis
mutualism
cooperation
Synecology is the study of
environment
individual
specific species
plant community
All the living organisms on earth constitute
biome
biosphere
community
population
Species that occur in different geographical regions separated by special barriers are
Allopatric
Autogenic
Sympatric
Allogenic
Plants growing on sea shores show characters of
hydrophytes
mesophytes
xerophytes
halophytes
Bio tic factors are
chemical factors of soil which affect life
physical factors of soil which affect life
all living organisms which influence other organisms
factors of atmosphere which affect life
Silent valley of Kerala is preserved because
it contains timber trees
it harbours lions
it harbours elephants
it contains rare animals and plants
When compared to the trophic level above, the total energy present in any given trophic level is necessarily
greater
lesser
the same
very small
The first fish that eats upon the planktonic form is
carnivore
primary consumer
secondary consumer
decomposers
Pedology is the study of
soil
rocks
animal diseases
locomotion of animals
Which of the following is an anti-forest conservation activity ?
Economy in timbering
Clear falling of trees
Prevention of fibres
Preservation of wild animals
Which is the correct sequence in a food-chain
Grass > Wolf �Deer -^Buffalo
Grass � Snake �Insect �Deer
Grass -�Insect >Birds >Snake
Bacteria ->Grass ~>Rabbit -�Wolf
The energy storage of consumer level is called
gross primary productivity
net primary productivity
secondary productivity
none of these
The main cause of soil erosion in India is
drought
heavy rainfall
deforestation
heavy winds
Association of a sea-anemone with hermit crab living in a gastropod shell is an example of
mutualism
commensalism
symbiosis
parasitism
In an ecosystem the population of
primary producers is larger than that of primary consumers
secondary consumers is the largest because they are most powerful
primary consumers is the least dependent upon primary producers.
primary consumers outnumber primary producers
In a food-chain, the saprophytic organisms are
producers
consumers
predators
decomposers
Soil particles are arranged in order of increasing size are
sand, silt and clay
silt, sand and clay
clay, sand and silt
clay, silt and sand
Smog is a combination of
air and water
water and smoke
smoke and fog
fire and water
Biome is
a part of the earth and its atmosphere which inhabits livings organisms
a community of organisms interacting with each other
the fauna and flora on land
the fauna and flora on ocean
The whale is
primary producer
carnivorous secondary consumer
herbivorous
a decomposers
The total interacting animals and plants in any well defined area which as field or a pond is known as
biosphere
biome
community
ecosystem
Ultra-violet radiation from sunlight causes the reaction that produce
CO
Fluorides
Which of the following is normally not an important atmospheric pollutant
CO
Hydro-carbon
Strontium- 90 can cause
lung diseases
bone cancer
leukaemia
skin cancer
Desert animals are called
arboreal
cursorial
benthos
xeric
Birth rate under ideal conditions is known as
mortality
natality
both and
none of these