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level: aiims and disha questions

Questions and Answers List

level questions: aiims and disha questions

Question	Answer
10 per cent law of energy transfer was given by	lindemann
flora and fauna in lakes and ponds is	lentic biota
the enzyme responsible for the reduction of molecular nitrogen to the level of ammonia in the leguminous root nodule is	ammoneases
the role of bacteria in the carbon cycle is	decomposition of organic compounds
desert can be converted into green land by planting	psammophytes
mr X is eating curd/yogurt.for his food intake in a food chain mr X should be considered occupying	third trophic level
explain the pyramid of biomass in a lake	this 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 of	material cycles
in the vast marine ecosystem, certain sea develop red colouation. this red colour is due to the presence of large population of	trichodesmium erythrium
most of the desert plant bloom at night because	the desert insects are active during night time
what is not a function of an ecosystem	stratification
insectivorous habitat of plants is to cope up with	nitrogen deficiency
pyramid of energy is always upright because	energy 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 heirarchy	biotic 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 are	detrivores
in an ecosystem the rate of production of organic matter during photosynthesis is termed as	gross primary productivity
secondary productivity is the rate of formation of new organic by	consumer
the biomass available for consumption by the herbivores and the decomposers is called	net primary productivity
the slow rate of decomposition of fallen logs in nature is due to their	low moisture content
which plants do not have stomata	submerged hydrophytes
greatest producers of organic matter are	phytoplanktons of oceans
upper part of sea/aquatic ecosystem contains	planktons
which ecosystem has the maximum biomass	forest ecosystem
characteristic feature of cropland ecosystem	least genetic diversity
during ecological succession	the 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 is	biotic community
the upright pyramid of number is absent in	forest
correct sequence of plants in a hydrosere is	volvox-->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 having	low stability and high resilience
bamboo plant is growing in a fir forest then what will be the trophic level of it	first trophic level
in a food chain, the largest population is that of	primary consumer
pyramid of numbers deals with the number of	individuals in a trophic level
pyramid of numbers in a pond ecosystem is	upright
barophilic prokaryotes	grow and multiply in very deep marine sediments
if by radiation all nitrogenase enzymes are inactivated, then there will be no	fixation of nitrogen in legumes