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Environmental Science

Environmental Science
The pyramid of numbers in a single tree is

Upright
Inverted
Spindle shaped
None of these

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Environmental Science
Which one of the following cycle is not a gaseous biogeochemical cycle in ecosystem?

Phosphorus
Sulphur
Nitrogen
Carbon

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Environmental Science
World's most problematic aquatic weed is

wolffia
azolla
eichornia
trapa

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Environmental Science
The pyramid of number of a parasitic food chain in forest ecosystem is

always upright
always inverted
mixture of inverted and upright
sometimes inverted and sometimes upright

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Environmental Science
Abyssal zone in ocean has

sunlight and decomposers
no sunlight but contains decomposers and consumers
no sunlight but contain producers
sunlight and producers

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Environmental Science
The slow rate of decomposition of fallen logs in nature is due to their

low cellulose content
poor nitrogen content
low moisture content
anaerobic environment around them

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