Darwin's birthday
World hygiene day
World environment day
World population day
C. World environment day
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
sand-silt and clay
silt-sand and clay
clay-sand and silt
clay-silt and sand
purification of water
formation of soil
sterilization of soil
degradation of soil
the roots are starved
of the mechanical injury to roots
most of the aerial parts are eaten away
of the mechanical injury to branches
Adaptation
Acclimatisation
Colonisation
All the above
Himachal Pradesh
Haryana
Tamil Nadu
Assam
Taiga ecosystem
Tundra ecosystem
Savannah ecosystem
Tropical rainforest
ozone
carbon monoxide and oxides of sulphur
hydrocarbons and hot air
algae spores and marsh gas
storage water
capillary water
field capacity
gravitational water
Diatoms
Lichens
Mosses
Ferns
biotic potential
biotic component
biological value
biological amplification
upright
inverted
upright or inverted
none of these
Solar energy
Hydro-power
Natural gas
All of these
Marine
Freshwater
Grassland
Pond
Botanical Survey of India - Calcutta
St. Xavier's Herbarium - Mumbai
Central National Herbarium - Calcutta
IARI - New Delhi
Lichens
Algae
Fungus
Fems
Forest prevent soil erosion
Forests act as water sheds
Forests have lots of water plants
Forests bring rainfall, in monsoon
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
green plants systhesize food
the green plants eat everything
they are fixed at a place
none of these
Darwin's birthday
World hygiene day
World environment day
World population day
soil structure
organic colloids
crystalloids
none of the above
Protozoa
Oxygen produced by plants
Sunlight
Manure in the soil
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
leukaemia
polio
pneumonia
haemophilia
a well developed root system
a well developed vascular system
a well developed stomatal system
a reduced vascular system
grass � wolf > deer > buffalo
bacteria � grass � rabbit > wolf
grass � insect � bird � snake
grass > snake �insect � deer
Succulents
Heterophyllous
Herbaceous
Viviparous
Nitrosomonas
Azotobacter
Nitrobacter
Closteridium
Typha latifolia
Cyperus rotundus
Parthenium
Eichhornia
encouragement of growth of microbes to decompose sewage
disinfection of sewage
removal of heavy grit from sewage in the settling chambers
pumping of sewage into aeration tanks for increased microbial activity