What is the major constituent of biomass of an organism
Nitrogen
Carbon
Phospnorus
Oxygen
Correct Answer :
B. Carbon
Related Questions
Laterization is a process which results in the
purification of water
formation of soil
sterilization of soil
degradation of soil
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
Plankton, Nekton and Itenthon are not the components of one of the following ecosystems:
Marine
Freshwater
Grassland
Pond
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
Humus is an example of
soil structure
organic colloids
crystalloids
none of the above
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
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
In grassland ecosystem the pyramid of energy is
upright
inverted
upright or inverted
none of these
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
Vegetation in Delhi is predominantly
halophytic
mesophytic
xerophytic
hydrophytic
Which one of the following is associated with the conservation of forest ?
Bharatpur
Kaziranga
Silent Valley
Gir
An American plant which had become a troublesome weed in India is
Typha latifolia
Cyperus rotundus
Parthenium
Eichhornia
Soil particles arranged in order of increasing size are
sand-silt and clay
silt-sand and clay
clay-sand and silt
clay-silt and sand
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
Which is the correct food chain
grass � wolf > deer > buffalo
bacteria � grass � rabbit > wolf
grass � insect � bird � snake
grass > snake �insect � deer
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
The least porous soil among the following is
loam soil
clay soil
sandy soil
poeaty soil
Silent valley is situated in
Kashmir
Kerala
Africa
America
Hydrilla is a
suspended hydrophyte
submerged hydrophyte
floating and anchored plant
a free floating hydrophyte
Desert plants are generally
Succulents
Heterophyllous
Herbaceous
Viviparous
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
. Biome is
the flora on land
the flora in ocean
a community of organisms interacting with each other
that part of earth and its atmosphere which inhabits living organisms
Water plants usually have
a well developed root system
a well developed vascular system
a well developed stomatal system
a reduced vascular system
Which of the following is normally not at atmospheric pollutant
CO
Hydrocarbons
The food chain in which microorganisms break down the energy-rich compounds synthesized by producers is
parasitic food chain
consumer food chain
detritus food chain
predator food chain
Carbon cycle includes
producer - consumer - decomposer
decomposer - consumer - producer
producer - decomposer - consumer
consumer - producer - decomposer
Deforestation may reduce the chances of
frequent cyclones
rainfall
frequent landslides
erosion of soil surface
Smog is a common pollutant in places having
excessive so2 in their air
excessive ammonia in the air
low temperature
high temperature