Pyramid of numbers deals with number of
Species in an area
Individuals in a community
Individuals in a tropic- level
Subspecies in a community
Pyramid of numbers in a pond ecosystem is
Irregular
Inverted
Upright
Spindle shaped
Xeric environment is characterised by
Precipitation
Low atmospheric humidity
Extremes of temperature
High rate of vapourisation
Animals that can tolerate a narrow range of salinity are
Stenohaline
Euryhaline
Anadromous
Catadromous
The pyramid which cannot be inverted in a stable ecosystem is that of
Biomass
Number
Energy
All of the above
Species diversity increases as one proceeds from
High altitude to low altitude and high latitude to low latitude
Low altitude to high altitude and high altitude to low latitude
Low altitude to high altitude and low latitude to high latitude
High altitude to low altitude and low latitude to high latitude
In grass- deer- tiger food chain, grass biomass is one tonne. The tiger biomass shall be
100 kg
10 kg
200 kg
1 kg
In a biotic community, the most important factor for survival of an animal is
Day length
Soil moisture
Green food
Predators
In a food chain, the largest population is that of
Producers
Decomposers
Secondary consumers
Primary consumers
Second most important trophic level in a lake is
Zooplankton
Phytoplankton
Benthos
Neuston
Tropical forests occur in India
Jammu and Kashmir
Rajasthan
Kerala and Assam
The forests do not occur in India
Bulk CO2 fixation occurs in
Crop plants
Oceans
Tropical rain forests
Temperature forests
Desert plants are generally
viviparous
succulent
herbaceous
heterophyllus
Which of the following does not have stomata?
hydrophytes
mesophytes
xerophytes
submerged hydrophytes
If we completely remove the decomposers, from an ecosystem, its functioning will be adversely affected, because
energy flow will be blocked
herbivores will not receive solar energy
mineral movement will be blocked
rate of decomposition will be very high
The primary succession refers to the development of communities on a
fleshly cleared crop field
forest clearing after devastating fire
pond, freshly filled with water after a dry phase
newly- exposed habitat with no record of earlier vegetation
Which of the following is the most stable ecosystem?
forest
desert
mountain
ocean
Sunken stomata is the characteristic feature of
hydrophyte
mesophyte
xerophyte
halophyte
Which of the following pairs is correctly matched?
uricotelism-aquatic habitat
parasitism – intra- specific relationship
excessive perspiration –xeric adaption
stream lined body- aquatic adaptation
In a biotic community, the primary consumers are
carnivores
omnivores
detritivores
herbivores