TMA4/BIO405

TMA: TMA4/BIO405

SCORE=9.50

BIO405 - Hydrobiology

Mr. Adams Abiodun (aadams@noun.edu.ng )

1 Eutrophic systems may contain a high concentration of which of these combinations of mineral nutrients? carbon and zinc calcium and boron nitrogen and oxygen phosphorus and nitrogen 2 In an eutrophic systems which of these is the limiting mineral nutrient? nitrogen oxygen hydrogen phosphorus and nitrogen 3 A cultural eutrophication process may also be refered to as --------------- eutrophication process polygenic carcinogenic anthropogenic non of the options 4 Cultural eutrophication is associated with ---------- which accelerate the eutrophication process beyond the rate associated with the natural process animal activities plant activities human activities chemical activities 5 Which of the following is not classified among the "point sources of eutrophication"? Runoff and leachate from waste disposal systems Septic tank leachate Overflows of combined storm and sanitary sewers Untreated sewage 6 The nonpoint sources of eutrophication include all of the following except Overflows of combined storm and sanitary sewers Runoff from pasture and range Urban runoff from unsewered areas Runoff from agriculture/irrigation 7 Which of the following is not a Symptom of Eutrophication? Production of toxins by certain algae Shift in habitat characteristics due to change in assemblage of aquatic plants Economic loss due to change in fish species non of the options 8 Which of the following is an effect of eutrophication on receiving ecosystem? Decreased biomass of benthic and epiphytic algae Decreases in perceived aesthetic value of the water body Increased sedimentation and shortening of life span of lake all of the options 9 Which of the following can cause water pollution? chemical spill manufacture's toxic chemical run off Oil drilling all of the options 10 The introduction of materials or energy to water bodies to a level that the water quality gets depleted is known as pollution soil pollution river pollution water pollution 11 Which of these is not a type of pollution? metallic pollution radioactive pollution thermal pollution all of the options 12 Pesticides contaminate watercourses as well as underground water by transpiration infiltration diffusion evaporation 13 66% of nitrate pollution of water is mainly caused by agricultural activities pharmaceutical activities biological activities mining activities 14 The effects of Water Pollution on ecosystems incude all of the following except Reduced water depth as a result of siltation and sedimentation Reduced light penetration and productivity due to increased turbidity Non-Inhibition of gaseous exchange between the water system and the atmosphere Depletion of dissolved oxygen content of water bodies and increase in biological oxygen demand 15 An aquatic ecosystem becomes unsanitary or unhealthy when the balance of its ------------ state is disturbed physical chemical biological activities natural 16 Soft water pollution can cause all of the following except tumours and deformations in animals death of certain species eutrophication all of the options 17 Which of the following statement is true? Water related diseases are diseases which affect man and/ animals as a result of contact with water Water related diseases are diseases which affect man and/ animals as a result of drinking of water Water related diseases are diseases which affect man and/ animals as a result of being attacked by aquatic organisms All of the options 18 Which of these organisms cause typhoid fever? Escherichia coli Salmonella Shigella Salmonella typhi 19 A water-borne disease called Shigellosis is also known as cholera botulism dysentery dengue fever 20 The general symptoms of Schistosomiasis are: very watery diarrhoea, rapid vomiting sustained fever upto 40 degree centigrade, profuse sweating, diarrhoea rash and itchy skin, fever, chills, coughs and muscle aches allergic reactions, urticaria, rash, nausea, vomiting         you can also attend Online Classes,Online Colleges,online tutorials online degree ,read more About law, insurance,Health e.t.c. to be well prepared for exam Goodluck.