Autumn colouration of leaves appears only in
Tropical regions
Deserts
Temperate deciduous plants
Deserts
Correct Answer :
C. Temperate deciduous plants
Related Questions
An American plant which had become a troublesome weed in India is
Typha latifolia
Cyperus rotundus
Parthenium
Eichhornia
Hie earliest settlers on barren lands are generally
Diatoms
Lichens
Mosses
Ferns
Tropical evergreen forests are seen in
Himachal Pradesh
Haryana
Tamil Nadu
Assam
Plankton, Nekton and Itenthon are not the components of one of the following ecosystems:
Marine
Freshwater
Grassland
Pond
One of these is a renewable source of energy:
Solar energy
Hydro-power
Natural gas
All of these
Biologists celebrate 5th June as
Darwin's birthday
World hygiene day
World environment day
World population day
Water plants usually have
a well developed root system
a well developed vascular system
a well developed stomatal system
a reduced vascular system
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
Which of the following is normally not at atmospheric pollutant
CO
Hydrocarbons
Which is the correct food chain
grass � wolf > deer > buffalo
bacteria � grass � rabbit > wolf
grass � insect � bird � snake
grass > snake �insect � deer
Autumn colouration of leaves appears only in
Tropical regions
Deserts
Temperate deciduous plants
Deserts
Correct definition of ecosystem is :
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
Smog is a common pollutant in places having
excessive so2 in their air
excessive ammonia in the air
low temperature
high temperature
Vegetation in Delhi is predominantly
halophytic
mesophytic
xerophytic
hydrophytic
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
Hydrilla is a
suspended hydrophyte
submerged hydrophyte
floating and anchored plant
a free floating hydrophyte
Silent valley is situated in
Kashmir
Kerala
Africa
America
The ultimate source of energy for fish is
Protozoa
Oxygen produced by plants
Sunlight
Manure in the soil
Radiation is a health hazard as it causes
leukaemia
polio
pneumonia
haemophilia
What is the major constituent of biomass of an organism
Nitrogen
Carbon
Phospnorus
Oxygen
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
The biggest herbarium of India is
Botanical Survey of India - Calcutta
St. Xavier's Herbarium - Mumbai
Central National Herbarium - Calcutta
IARI - New Delhi
Carbon cycle includes
producer - consumer - decomposer
decomposer - consumer - producer
producer - decomposer - consumer
consumer - producer - decomposer
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
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
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 best indicator of SO^2 pollution is
Lichens
Algae
Fungus
Fems
Desert plants are generally
Succulents
Heterophyllous
Herbaceous
Viviparous
In grassland ecosystem the pyramid of energy is
upright
inverted
upright or inverted
none of these
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