ecology

[amp_mcq option1=”Bentham and Hooker” option2=”Darwin” option3=”Tansley” option4=”Hutchinson ” correct=”option3″]

Detailed SolutionWho among the following has hypothesised the structure and function of ecosystem ?

[amp_mcq option1=”For nutrient recovery and cycling” option2=”For releasing heavy metals through absorption by plants” option3=”In reducing siltiation of rivers by retaining sediments” option4=”All the above” correct=”option4″]

Detailed SolutionAs an ecosystem, wetlands arc useful for which of the following ?

[amp_mcq option1=”Water management” option2=”Afforestation” option3=”Industrial Management” option4=”Wild life protection” correct=”option3″]

Detailed SolutionWhich one of the following is not related with ecological balance?

[amp_mcq option1=”The water cycle in wetlands involves surface runoff, subsoil percolation and evaporation.” option2=”Algae form the nutrient base upon which fish, crustaceans, molluses, birds, reptiles and mammals thrive.” option3=”Wetlands play a vital role in maintaining sedimentation balance and soil stabilieation.” option4=”Aquatic plants absorb heavy metals and excess nutrients,” correct=”option4″]

Detailed Solution143.If rainforests and tropical forests are the lungs of the Earth, then surely wetlands function as its kidneys Which one of the following functions of wetlands best reflects the abore statement ?

[amp_mcq option1=”Energy flow in the biospheric ecosystem is unidirectional.” option2=”Energy flow in the biospheric ecosystem is cyclic.” option3=”Relative loss of energy in natural ecosystem decreases with increasing trophic levels.” option4=”Species at progressively higher tropic levels appear to be less efficient, in using available energy.” correct=”option1″]

Detailed SolutionWhich of the following is a correct statement?

[amp_mcq option1=”It comprises both, abiotic and biotic components.” option2=”It has its own productivity.” option3=”It is a closed system.” option4=”It is a natural resource system.” correct=”option3″]

Detailed SolutionWhich of the following is not correct about ecosystem?

[amp_mcq option1=”It represents all living organisms and physical environment in any given space-time unit.” option2=”It is a functional unit.” option3=”It has own productivity.” option4=”It is a closed-system. .” correct=”option4″]

Detailed SolutionWhich of the following is not true about the eco-system?

[amp_mcq option1=”A.H. Strahler” option2=”A.G. Tansley” option3=”C.C. Park” option4=”F.R. Fosberg” correct=”option2″]

Detailed SolutionThe concept of ecosystem is attributed to:

[amp_mcq option1=”Temperate forests” option2=”Tropical forests” option3=”Temperate grasslands” option4=”Tropical savanna” correct=”option3″]

Detailed SolutionWhich of the following has the lowest mean net primary productivity?

[amp_mcq option1=”Producers” option2=”Primary consumers” option3=”Secondary consumers” option4=”Tertiary consumers ” correct=”option2″]

Detailed SolutionIn a grassland eco-system termites occupy the trophic level of _____.