In grassland ecosystem the pyramid of energy is
upright
inverted
upright or inverted
none of these
Correct Answer :
A. upright
Related Questions
The least porous soil among the following is
loam soil
clay soil
sandy soil
poeaty soil
Hie earliest settlers on barren lands are generally
Diatoms
Lichens
Mosses
Ferns
What is the major constituent of biomass of an organism
Nitrogen
Carbon
Phospnorus
Oxygen
One of these is a renewable source of energy:
Solar energy
Hydro-power
Natural gas
All of these
Smog is a common pollutant in places having
excessive so2 in their air
excessive ammonia in the air
low temperature
high temperature
The nitrifying bacteria which oxidise nitrite to nitrates include
Nitrosomonas
Azotobacter
Nitrobacter
Closteridium
. 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
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
Pedology is the study of
soil
locomotion of animals
rocks
crop diseases
Humus is an example of
soil structure
organic colloids
crystalloids
none of the above
Radiation is a health hazard as it causes
leukaemia
polio
pneumonia
haemophilia
Desert plants are generally
Succulents
Heterophyllous
Herbaceous
Viviparous
The ultimate source of energy for fish is
Protozoa
Oxygen produced by plants
Sunlight
Manure in the 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
The first stage of plant succession on earth is called
Adaptation
Acclimatisation
Colonisation
All the above
Laterization is a process which results in the
purification of water
formation of soil
sterilization of soil
degradation of soil
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
Biologists celebrate 5th June as
Darwin's birthday
World hygiene day
World environment day
World population day
Which of the following is normally not at atmospheric pollutant
CO
Hydrocarbons
Water plants usually have
a well developed root system
a well developed vascular system
a well developed stomatal system
a reduced vascular system
The best indicator of SO^2 pollution is
Lichens
Algae
Fungus
Fems
Commensalism is
when both organisms are benefited
when one organism is benefited without affecting the other
when one organism is affected
when both organisms are affected
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
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
Vegetation in Delhi is predominantly
halophytic
mesophytic
xerophytic
hydrophytic
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
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
Autumn colouration of leaves appears only in
Tropical regions
Deserts
Temperate deciduous plants
Deserts
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
The source of energy in the ecosystem is:
decomposition of animals and plants by bacteria
photosynthesis by green plants
fermentation of sugars
sun-light