A pollutant is any substance, chemical or other factor that changes
natural geochemical cycles
the natural flora of a place
the natural wild life of a region
the natural balance of our environment
Correct Answer :
D. the natural balance of our environment
Related Questions
The biggest herbarium of India is
Botanical Survey of India - Calcutta
St. Xavier's Herbarium - Mumbai
Central National Herbarium - Calcutta
IARI - New Delhi
The nitrifying bacteria which oxidise nitrite to nitrates include
Nitrosomonas
Azotobacter
Nitrobacter
Closteridium
Mark which is true
A food chain is a chain of food consumers
A food chain is chain of food producers
A food chain is a series of organisms through which food energy flows in an ecosystem
None of the above
Radiation is a health hazard as it causes
leukaemia
polio
pneumonia
haemophilia
In cities like Mumbai and Delhi, the major air pollutants are
ozone
carbon monoxide and oxides of sulphur
hydrocarbons and hot air
algae spores and marsh gas
Deforestation may reduce the chances of
frequent cyclones
rainfall
frequent landslides
erosion of soil surface
A habitat of long severe winters and growing season limited to a few months of summer constitutes
Taiga ecosystem
Tundra ecosystem
Savannah ecosystem
Tropical rainforest
In grassland ecosystem the pyramid of energy is
upright
inverted
upright or inverted
none of these
What will happen if our water resources are continued to be polluted by industrial wastes
Sufficient food will not be available to water organisms
Sufficient oxygen will not be available to water organisms
Drinking water will not be available
B.O.D value of water will decrease
Laterization is a process which results in the
purification of water
formation of soil
sterilization of soil
degradation of soil
Humus is an example of
soil structure
organic colloids
crystalloids
none of the above
Correct definition of ecosystem is :
A community of organisms interacting with one another
The abiotic component of a habitat
The part of the earth and its atmosphere which inhabits living organisms
The community of organisms together with environment in which they live
The best indicator of SO^2 pollution is
Lichens
Algae
Fungus
Fems
One of these is a renewable source of energy:
Solar energy
Hydro-power
Natural gas
All of these
Competition for food, light and space is most severe in
closely related species growing in the same niche
closely related species growing in different habitats
distantly related species growing in same habitat
distantly related species growing in different habitats
A pollutant is any substance, chemical or other factor that changes
natural geochemical cycles
the natural flora of a place
the natural wild life of a region
the natural balance of our environment
Plankton, Nekton and Itenthon are not the components of one of the following ecosystems:
Marine
Freshwater
Grassland
Pond
Increasing accumulation of DDT in organisms of a food chain in higher trophic levels is known as
biotic potential
biotic component
biological value
biological amplification
Tropical evergreen forests are seen in
Himachal Pradesh
Haryana
Tamil Nadu
Assam
The source of energy in the ecosystem is:
decomposition of animals and plants by bacteria
photosynthesis by green plants
fermentation of sugars
sun-light
First link in any food chain is green plant because
green plants systhesize food
the green plants eat everything
they are fixed at a place
none of these
Which one of the following is associated with the conservation of forest ?
Bharatpur
Kaziranga
Silent Valley
Gir
The ultimate source of energy for fish is
Protozoa
Oxygen produced by plants
Sunlight
Manure in the soil
Carbon cycle includes
producer - consumer - decomposer
decomposer - consumer - producer
producer - decomposer - consumer
consumer - producer - decomposer
Which of the following is normally not at atmospheric pollutant
CO
Hydrocarbons
Pedology is the study of
soil
locomotion of animals
rocks
crop diseases
The first stage of plant succession on earth is called
Adaptation
Acclimatisation
Colonisation
All the above
The least porous soil among the following is
loam soil
clay soil
sandy soil
poeaty soil
An area of soil is thoroughly wetted and allowed to drain until capillary movement of water is stopped. The water content of the soil now gives
storage water
capillary water
field capacity
gravitational water
Biosphere is:
In which individuals interact with each other
In which life originated
The name of a bird
Organic compound by which life diminih