Silent valley of Kerala is preserved because
it contains timber trees
it harbours lions
it harbours elephants
it contains rare animals and plants
Correct Answer :
A. it contains timber trees
Related Questions
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
Species that occur in different geographical regions separated by special barriers are
Allopatric
Autogenic
Sympatric
Allogenic
Biological equilibrium is equilibrium among the
producers
producers and consumers
decomposers and producers
producers, consumers and decomposers
Animals which live at the bottom of the sea are called
leutic
benthic
pelagic
none of these
When a big fish eats a small fish, which eats water fleas supported by phyto-plankton, the water-fleas are
producers
primary consumers
secondary consumers
top consumers in the food-chain
The first fish that eats upon the planktonic form is
carnivore
primary consumer
secondary consumer
decomposers
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
Which of the following atmospheric pollutants is not produced by the exhaust of motor vehicles in Delhi
Fly ash
Hydrocarbon gases
CO
Plants growing on sea shores show characters of
hydrophytes
mesophytes
xerophytes
halophytes
Ultra-violet radiation from sunlight causes the reaction that produce
CO
Fluorides
The whale is
primary producer
carnivorous secondary consumer
herbivorous
a decomposers
Animals in cold regions have fur because
hair is a good insulating material
hairs trap air which acts as insulator
they like fur
none of these
When compared to the trophic level above, the total energy present in any given trophic level is necessarily
greater
lesser
the same
very small
An organism which lives at the expense of another organism is called
predator
prey
host
parasite
An association between two or more species in which both are benefited is known as
commensalism
symbiosis
mutualism
cooperation
Which of the following is normally not an important atmospheric pollutant
CO
Hydro-carbon
Which one is the direct ecological factor ?
Soil structure
Wind
Temperature
Climate
The most widespread form of symbiosis in nature is
mutualism
commensalism
predatism
parasitism
Desert animals are called
arboreal
cursorial
benthos
xeric
Birth rate under ideal conditions is known as
mortality
natality
both and
none of these
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
The total set of feeding relationships in a biotic community is called
a food chain
trophic levels
food webs
ecosystem
The term "ecosystem" was first proposed by
A.G. Tansely
H.T. Odum
Karl Mobius
None of these
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
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
Which of the following is an anti-forest conservation activity ?
Economy in timbering
Clear falling of trees
Prevention of fibres
Preservation of wild animals
The total interacting animals and plants in any well defined area which as field or a pond is known as
biosphere
biome
community
ecosystem
The soils transported by water are called
peat
alluvial
colluvial
none of these
The transitional zone where two different types of communities meet is called the
Ecotype
Littoral
Ecotone
Both and