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level: aiims and disha questions

Questions and Answers List

level questions: aiims and disha questions

QuestionAnswer
10 per cent law of energy transfer was given bylindemann
flora and fauna in lakes and ponds islentic biota
the enzyme responsible for the reduction of molecular nitrogen to the level of ammonia in the leguminous root nodule isammoneases
the role of bacteria in the carbon cycle isdecomposition of organic compounds
desert can be converted into green land by plantingpsammophytes
mr X is eating curd/yogurt.for his food intake in a food chain mr X should be considered occupyingthird trophic level
explain the pyramid of biomass in a lakethis pyramid is inverted because there is gradual increase in biomass of organisms at successive trophic levels from the producers to the consumers.
an ecosystem, such as an aquarium, is self sustaining if it involves the interaction b/w organisms, a flow of energy and the presence ofmaterial cycles
in the vast marine ecosystem, certain sea develop red colouation. this red colour is due to the presence of large population oftrichodesmium erythrium
most of the desert plant bloom at night becausethe desert insects are active during night time
what is not a function of an ecosystemstratification
insectivorous habitat of plants is to cope up withnitrogen deficiency
pyramid of energy is always upright becauseenergy flow in the ecosystem is unidirectional and according to lindemann, only 10 per cent of the energy goes to the next level
biotic community has higher position than population in ecological heirarchybiotic community is an assemblage of all the populations of different organisms occuring in an area. the different populations of a community do not remain isolated. they show interactions and interdependance
most animals that live in deep oceanic waters aredetrivores
in an ecosystem the rate of production of organic matter during photosynthesis is termed asgross primary productivity
secondary productivity is the rate of formation of new organic byconsumer
the biomass available for consumption by the herbivores and the decomposers is callednet primary productivity
the slow rate of decomposition of fallen logs in nature is due to theirlow moisture content
which plants do not have stomatasubmerged hydrophytes
greatest producers of organic matter arephytoplanktons of oceans
upper part of sea/aquatic ecosystem containsplanktons
which ecosystem has the maximum biomassforest ecosystem
characteristic feature of cropland ecosystemleast genetic diversity
during ecological successionthe gradual and predictable change in species composition occurs in a given area
an association of individuals of different species living in the same habitat and having functional interaction isbiotic community
the upright pyramid of number is absent inforest
correct sequence of plants in a hydrosere isvolvox-->hydrosere-->pistia-->scirpus-->lantana-->oak
what is not used for the construction of ecological pyramids ?fresh weight
an ecosystem which can be easily damaged but can recover after some time if damaging effect stops will be havinglow stability and high resilience
bamboo plant is growing in a fir forest then what will be the trophic level of itfirst trophic level
in a food chain, the largest population is that ofprimary consumer
pyramid of numbers deals with the number ofindividuals in a trophic level
pyramid of numbers in a pond ecosystem isupright
barophilic prokaryotesgrow and multiply in very deep marine sediments
if by radiation all nitrogenase enzymes are inactivated, then there will be nofixation of nitrogen in legumes