when both organisms are benefited
when one organism is benefited without affecting the other
when one organism is affected
when both organisms are affected
B. when one organism is benefited without affecting the other
natural geochemical cycles
the natural flora of a place
the natural wild life of a region
the natural balance of our environment
parasitic food chain
consumer food chain
detritus food chain
predator food chain
upright
inverted
upright or inverted
none of these
purification of water
formation of soil
sterilization of soil
degradation of soil
soil
locomotion of animals
rocks
crop diseases
Nitrogen
Carbon
Phospnorus
Oxygen
suspended hydrophyte
submerged hydrophyte
floating and anchored plant
a free floating hydrophyte
Lichens
Algae
Fungus
Fems
halophytic
mesophytic
xerophytic
hydrophytic
Typha latifolia
Cyperus rotundus
Parthenium
Eichhornia
soil structure
organic colloids
crystalloids
none of the above
Succulents
Heterophyllous
Herbaceous
Viviparous
Forest prevent soil erosion
Forests act as water sheds
Forests have lots of water plants
Forests bring rainfall, in monsoon
ozone
carbon monoxide and oxides of sulphur
hydrocarbons and hot air
algae spores and marsh gas
the roots are starved
of the mechanical injury to roots
most of the aerial parts are eaten away
of the mechanical injury to branches
when both organisms are benefited
when one organism is benefited without affecting the other
when one organism is affected
when both organisms are affected
leukaemia
polio
pneumonia
haemophilia
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
Darwin's birthday
World hygiene day
World environment day
World population day
green plants systhesize food
the green plants eat everything
they are fixed at a place
none of these
Taiga ecosystem
Tundra ecosystem
Savannah ecosystem
Tropical rainforest
a food chain
genetic drift
ecological succession trend
a phylogenetic trend
storage water
capillary water
field capacity
gravitational water
decomposition of animals and plants by bacteria
photosynthesis by green plants
fermentation of sugars
sun-light
Botanical Survey of India - Calcutta
St. Xavier's Herbarium - Mumbai
Central National Herbarium - Calcutta
IARI - New Delhi
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
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
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
a well developed root system
a well developed vascular system
a well developed stomatal system
a reduced vascular system
Tropical regions
Deserts
Temperate deciduous plants
Deserts