21.
21st March is observed as
A
World forest day
B
World environment day
C
World wildlife day
D
World population day
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21st March is observed as
World forest day
World environment day
World wildlife day
World population day
Zone consisting air, water and soil is known as
Lithosphere
Biosphere
Hydrosphere
Atmosphere
Word oikos means.............and logos means..............
Only houses
Study of people
Houses and study of
Study and houses
Which of the following statement about the forest is not correct
Provides economic development
None of the above
Forest reduces soil erosion
Provides recreational opportunities
Which of the following is not a method of water conservation
improving irrigation efficiency
avoiding water wastage
rain water harvesting
ground water extraction
The three major living components of an ecosystem are
Heterotrophs, Consumers and Reducers
Detritivores, Consumers and Phototrophs
Producers, consumers and Decomposers
Producers, Autotrophs and Decomposers
The term Environment is derived from an old French word enviro means
Inside
Biotic community
Outside
Surroundings
The TAJ MAHAL at AGRA may be damaged by
hydrogen
oxygen
sulphur dioxide
chlorine
The sudden increase in the population of the species is
over population
all above
population growth
population explosion
The subsurface sources of water is
Stream
Ocean
River
Dug well
The most important organisms of an ecosystem are
Carnivores
Protozon
Herbivores
Producers
The main components of photochemical smog is
oxides of nitrogen
all of the above
water vapour
sulphur dioxide
The loss of water from plants and tree leaves is called
Evaporation
Transpiration
Precipitation
Respiration
The layers of atmosphere consists of
Lithosphere and Hydrosphere
Biosphere and Hydrosphere
Troposphere, Stratosphere, Mesosphere and Temperature
Hydrosphere and biosphere
The layer which provides ideal site for flying of jet planes is
Mesosphere
Troposphere
Thermosphere
Stratosphere
The green plants are also called
Producers
Consumers
Reducers
Detritivores
The flow of energy is
Oneway
Cyclic
Linear and oneway
None of these
The Ecological pyramid that is always upright
Pyramid of energy
Pyramid of biomass
Pyramid of number
None of these
The ecological pyramid always starts with the following at the base
Decomposer
Producer
Consumer
None of these
The drop in air temperature at a rate of 6.50 C per 1000 m increase in altitude of troposphere is known as
Environmental lapse rate
Environmental degradation
Green house effect
Global warming