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which part of the carbon cycle is responsible for the enhancing concentration of carbon dioxide in the atmospherethe burning of fossilized products
a what are the two main pollutants that contribute to acid rain b where do these pollutants come from c what direct or indirect effect is acid rain
in what ways does over-grazing lead to soil erosionover-grazing leads to erosion because i the animals delete all the vegetation so exposing the soil
list the short-term and long-term effects of forest destruction a on hillsides b in the tropics a deforestation on hillsides exposes the soil
what are the principal sources of excessive nitrate and phosphate in rivers and lakes excessive nitrates and phosphates come majorly from sewage
a what is the special property of a persistent insecticide b in what ways is persistence i a useful property ii a harmful property a a persistent
distinguish among the terms pesticide insecticide and herbicide a pesticide is a compound which destroys or controls any organism which is
list three human activities which could cause the loss of a species human activities which threaten species with extinction are i hunting of
q what is tricuspid valve annuloplastyit depends upon the cause of tricuspid regurgitation specific therapy is directed towards the particular cause
q haemodynamics of tricuspid regurgitationright atrial pressure tracing shows a prominent lsquov wave and these cannot be appreciated in a patient
q investigation of tricuspid regurgitation by echo dopplerinvestigations ecg in secondary tr shows evidence of right atrial overload and right
q clinical features of tricuspid regurgitationpatients with severe primary tricuspid regurgitation will have symptoms of fatigue dyspnoea and effort
q pathophysiology of tricuspid regurgitationtricuspid regurgitation is associated with prominent venous filling waves and elevated right atrial
a in what ways do farmers try to improve the quality of i their soil ii their crop plants b what other steps do farmers take to maximise
q explain tricuspid regurgitationthough tricuspid regurgitation is a common valvular abnormality on echocardiography rarely is it due to primary
what part do a nitrifying b nitrogen-fixing and c denitrifying bacteria play in the nitrogen cyclea nitrifying bacteria in the soil change ammonia
a meal consists of grilled trout potatoes and mushrooms explain how each item is ultimately the product of photosynthesistrout eat aquatic insects
q medical therapy for tricuspid stenosismedical therapy is ineffective with diuretics symptoms of congestion are replaced by that of low cardiac
q hemodynamic measurements of tricuspid stenosisunless one suspects it clinically and echocardiographically and plans the hemodynamic study -
q investigation of tricuspid stenosis by echocardiographyfindings are subtle one should carefully search for organic tricuspid valve involvement in
what would be the advantage of using a patients own stem cells eg blood stem cells to treat his or her illness the benefit of using stem cells from
what are the possible sources of human embryonic stem cells embryonic stem cells can be derived from individual cells of an early embryo from blood
what is the special characteristic of a stem cells b embryonic stem cellsa stem cells can continue to divide throughout their lifebthe special
dna can be divide into fragments using restriction enzymes a outline the technique used to separate these fragments b what property
give three examples of genetic engineering that are intended to improve crop plants genetic engineering of crop plants can improve resistance to