One of these is a renewable source of energy:
Solar energy
Hydro-power
Natural gas
All of these
Correct Answer :
A. Solar energy
Related Questions
What is the major constituent of biomass of an organism
Nitrogen
Carbon
Phospnorus
Oxygen
Smog is a common pollutant in places having
excessive so2 in their air
excessive ammonia in the air
low temperature
high temperature
The least porous soil among the following is
loam soil
clay soil
sandy soil
poeaty soil
Which of the following functions performed by forests help most in controlling drought
Forest prevent soil erosion
Forests act as water sheds
Forests have lots of water plants
Forests bring rainfall, in monsoon
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
The first stage of plant succession on earth is called
Adaptation
Acclimatisation
Colonisation
All the above
Autumn colouration of leaves appears only in
Tropical regions
Deserts
Temperate deciduous plants
Deserts
The nitrifying bacteria which oxidise nitrite to nitrates include
Nitrosomonas
Azotobacter
Nitrobacter
Closteridium
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
When young plants are grazed too heavily they get killed because
the roots are starved
of the mechanical injury to roots
most of the aerial parts are eaten away
of the mechanical injury to branches
The ultimate source of energy for fish is
Protozoa
Oxygen produced by plants
Sunlight
Manure in the soil
Hie sequence blue green algae > crustose lichens � foliose lichens > mosses � shrubs � dicotyledonous tree represents
a food chain
genetic drift
ecological succession trend
a phylogenetic trend
One of these is a renewable source of energy:
Solar energy
Hydro-power
Natural gas
All of these
In grassland ecosystem the pyramid of energy is
upright
inverted
upright or inverted
none of these
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
Hydrilla is a
suspended hydrophyte
submerged hydrophyte
floating and anchored plant
a free floating hydrophyte
Silent valley is situated in
Kashmir
Kerala
Africa
America
Deforestation may reduce the chances of
frequent cyclones
rainfall
frequent landslides
erosion of soil surface
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
Water plants usually have
a well developed root system
a well developed vascular system
a well developed stomatal system
a reduced vascular system
Plankton, Nekton and Itenthon are not the components of one of the following ecosystems:
Marine
Freshwater
Grassland
Pond
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
Radiation is a health hazard as it causes
leukaemia
polio
pneumonia
haemophilia
The biggest herbarium of India is
Botanical Survey of India - Calcutta
St. Xavier's Herbarium - Mumbai
Central National Herbarium - Calcutta
IARI - New Delhi
Vegetation in Delhi is predominantly
halophytic
mesophytic
xerophytic
hydrophytic
Desert plants are generally
Succulents
Heterophyllous
Herbaceous
Viviparous
An American plant which had become a troublesome weed in India is
Typha latifolia
Cyperus rotundus
Parthenium
Eichhornia
The source of energy in the ecosystem is:
decomposition of animals and plants by bacteria
photosynthesis by green plants
fermentation of sugars
sun-light
Carbon cycle includes
producer - consumer - decomposer
decomposer - consumer - producer
producer - decomposer - consumer
consumer - producer - decomposer
Pedology is the study of
soil
locomotion of animals
rocks
crop diseases