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level: aiims and disha questions

Questions and Answers List

level questions: aiims and disha questions

QuestionAnswer
territoriality occurs as a result ofcompetition
abundance of species in a population, within habitat is calledniche density
july 11th is observed asworld population day
the great barrier reef along the east coast of austalia can be categorised asecosystem
presence of flagellated protozoans in the gut of termites are the examples ofsymbiosis
the formula for exponential population growth isdN/dt=rN
what is the formula for growth ratebirth+immigration- death+emmigration/total no.of population
leaf butterfly and stick insects show mimicry to dodge their enemy using mimicry, what is it?mimicry is a method to aquire body colour blending with the suroundings
species are groups of potentially interbreeding natural populations which are isolated from other such groupsdistinctive morphological characters are displayed due to reproductive isolation
large woody vines are more commonly found intropical rainforests
adaptaion to environment in desert lizardsburrowing in soil to escape high temperature
adaptations in kangaroo and ratthey feed on dry seeds and do not require drinking water. they excrete very concentrated urine and do not use water to regulate body temperature
are coniferous trees evergreenyes coniferous trees are evergreen
what is a prairiethey are enormous streches of flat grassland with moderate temperatures, moderate rainfall, and few trees
diffuse porous woods are characteristic of plants growing intropics
cause of mimicry isconcealment
plants such as acasia, prosopis and capparis are examples of which tropical forestthorn forest
species occuring in different geographical areas are calledallopatric
the high boiling point of water is advantageous to living organisms becauseorganisms can easily boil off enough water to keep themselves cool
xeric environment is characterised bylow atmospheric humidity
soil best suited for plant growth isloamy
homeostatis istendency of biological systems to resist change
deep black soil is productive due to high proportion ofclay and humus
asymptote in a logistic growth curve is obtained byK=N
rhodospirillum is abacteria
a sedentary sea anemone gets attached to the shell lining of hermit crab. the association iscommennsalism
which one of the following is one of the characteristics of a biological communitystratification
the population of an insect species shows an explosive increase in numbers during rainy season followed by its disappearance at the end of the season. what does it show?its population growth curve is J-shaped
a high density of elephant in an area can result inintra specific competition
two forces operate in the growth and development of every population. one of them relates to the ability to reproduce at a given rate. the force opposing it is called.environmental resistance
in a population unrestricted reproductive capacity is called asbiotic potential
what is the correct sequence of stages of growth curve for bacterialag,log,stationary and decline phase
the semilog of per minute growing bacteria is plotted against time. what is it's shape?ascending straight line
name some insectivorous plantsutricularia, drosera, dionaea
which type of association is found between entomophilous flower and pollinating agentmutualism
exponential growth of cells is a characteristic feature oftissue culture cells
a pair of insectivorous plants isnepenthes and bladderword
human population in indiacan be regulated by following the national programme of family planning
vivipary is a characteristic ofhalophytes