The transitional zone where two different types of communities meet is called the
Ecotype
Littoral
Ecotone
Both and
Correct Answer :
C. Ecotone
Related Questions
The total set of feeding relationships in a biotic community is called
a food chain
trophic levels
food webs
ecosystem
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
Species that occur in different geographical regions separated by special barriers are
Allopatric
Autogenic
Sympatric
Allogenic
When compared to the trophic level above, the total energy present in any given trophic level is necessarily
greater
lesser
the same
very small
Trophic levels are formed by
plants only
animals only
organisms linked in food chains
all of these
The total interacting animals and plants in any well defined area which as field or a pond is known as
biosphere
biome
community
ecosystem
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
Some animals have a constant high body temperature. This is because
they like this temperature
they can work fast in the temperature
they prefer to live in cold region
they are active animals
Silent valley of Kerala is preserved because
it contains timber trees
it harbours lions
it harbours elephants
it contains rare animals and plants
Synecology is the study of
community in relation to environment
individuals
environment
water
Birth rate under ideal conditions is known as
mortality
natality
both and
none of these
The energy storage of consumer level is called
gross primary productivity
net primary productivity
secondary productivity
none of these
Gas liberated in Bhopal gas tragedy was
methyl isocyanide
phenyl isocyanide
ethylene
acetylene
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 most polluted city in the world is
Tokyo
New York
Calcutta
Mexico
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
An organism which lives at the expense of another organism is called
predator
prey
host
parasite
Plants growing on sea shores show characters of
hydrophytes
mesophytes
xerophytes
halophytes
Biological equilibrium is equilibrium among the
producers
producers and consumers
decomposers and producers
producers, consumers and decomposers
Trophic levels are formed by
plants only
animals only
carnivorous animals only
organisms linked in food-chains
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 source of energy in an ecosystem is
light received from sun
heat liberated during respiration
heat liberated during fermentation
none of these
The whale is
primary producer
carnivorous secondary consumer
herbivorous
a decomposers
Pedology is the study of
soil
rocks
animal diseases
locomotion of animals
All the living organisms on earth constitute
biome
biosphere
community
population
The main cause of soil erosion in India is
drought
heavy rainfall
deforestation
heavy winds
Which of the following atmospheric pollutants is not produced by the exhaust of motor vehicles in Delhi
Fly ash
Hydrocarbon gases
CO
An association between two or more species in which both are benefited is known as
commensalism
symbiosis
mutualism
cooperation
Animals which live at the bottom of the sea are called
leutic
benthic
pelagic
none of these
Which of the following is an anti-forest conservation activity ?
Economy in timbering
Clear falling of trees
Prevention of fibres
Preservation of wild animals