biology general knowledge

 

Questions 1. The first biocide used on a large scale was ? 
a) DDT 
b) methane
c) polysaccharide
d) sugar cane

Answere: DDT 

Questions 2.Why sewage drained water bodies kill fishes ?
a) it may be high temperature
b) it goes against hlbidg heat 
c) due to deficiency of oxygen in the water
d) it increases the competion with fishes  to disolved water .

Answer: it increases the competion with fishes  to disolved water .

Questions 3.which of the following types of pollution due to outbreak of jaundice ?
a) Air 
b) food 
c) water 
d) soil

Answer: water

Questions 4.The most common organisms that represents the polluted water ?
a) Eascharia coli 
b) Entabamoeba histrolytica
c) Anopheles vivax
d) Vibro

Answer: Easchaeria coli 

Questions 5. What is main reason of water Pollution cause ?
a) Due to  increased deoxygenation and turbidity 
b) due to lack of oxygen
c) Due to  access of air 
d) due to exacess of oxygen during storm .

Answer:  Due to  increased deoxygenation and turbidity 

Questions 6.which  of the following methods  pollution can be controlled by ?
a) swage Treatment 
b) using gas realsesd 
c) using  sand and mud put into the water 
d) using nuclear weapons 

Answer: swage Treatment

Questions 7. What is the main reason of thermal pollution of lakes ?
a) Due to nuclear power plant
b) Due to gobargas
c) due to access of water in lakes 
d) due to collided of  water  

Answer: Due to nuclear power plant.

Questions 8.which of the following system of affected by Minimata diseases ?
a) liver system
b) heart 
c) brains
d) Neverous system

Answer : Nervous system

Questions 9.Itai_ itai disease  is caused by ?
a) cadmium
b) HG 
c) nitrogen gas
d) Dye

Answer: cadmium 

Questions10.Which of the following is likely to have highest concentration of DDT in the human body ?
a) Sea Gull 
b) sponge 
c) caricaroua 
d) Easchaeria coli 

 Answer: Sea Gull

11.Minamata Disease is  produced due to the  pollution of water  with the ?
a) Methyl isocyanate
b) calcium carbonate
c) Carbon dioxide
d) Glucose 

Answer: Methyl isocyanate

Question 12.The increasing  concentrations of DDT  in organism  of a food chain in the higher trophic levels is the known as  ?
a) Biomgagnification 
b) Bioreactor 
c) Biotic components 
d) Biological amplification 

Answers : Biological amplification

Questions 13. which if the following pollutants affect more to organisms of the higher trophic levels of the food chain due to the bio amplification ?
a) nitrous oxide and methane
b) Carbon fiber
c) Carbon monoxide
d) Heavy metals, Mercury  salts  and the biodegradable phenolic chemical 

Answer:Heavy metals, Mercury  salts  and the biodegradable phenolic chemical

Questions 14.Which of the following reasons due  to water pollution ? 
a) 2, 4 D  and  pesticides 
b) Excess rain
c) due to car smoke
d)  Due to Automobile increasing

Answer: 2,4 D and pesticides 

Questions 15.BOD is connected with which of the following?
a) Microbe and organic matter 
b) sulphur
c) sulphuric acid 
d) Eutrophication

Answer: microbe and organic matter 

Questions 16. BOD is a measure of polluting  organic matter present in ?
a) sand
b) mud
c) soil 
d) water

 
Answer: water 

Questions 17.What do you mean by the BOD ?
a) biology ominous dentology
b) biology objective Detroit
c) Biochemical oxygen Demand
d) Biochemical oxygen demerits 

Answer: Biochemical oxygen Demand

Questions 18.When the huge amount of sewage dumped into the river ,well then What will be the BOD ?
a) increase 
b) decrease 
c) remian constant 
d) none of these 

Answer: increase 

Questions 19.The population explosion of the small organism due to nutrients enrichment of a lake cause a visual aspect  is called ?
a) pentago
b) state changer
c) Bloom
d) Bloomberg

Answer : Bloom 

Questions 20.In a polluted lake , which of the following indexed  the pollution ?
a) cherry  blossom 
b) algae
c) fish 
d) Dhapnia

Answer: Dhapnia 

Questions 21. Which of the following Eutrophication  cause reductions  in ?
a) desolved   oxygen
b) remaining unchanged 
c) constant  disolved 
d) slightly disolved oxygen 

Answer : desolved oxygen 

Questions 22.Human activity  speed the eutrophication process of ?
a) lake 
b) pond 
c) canal 
d) All of these 

Answer: lake 

Questions 23.Eutrophic lake are commonly ?
a) rich in nutrients 
b) obligate parasite 
c) alleotrophic
d) oligonucleotide

Answer: rich in nutrients 

Questions 24.Shallow  lake  with rich organic  products is called as ? 
a) eutrophic
b) eligible 
c) promoter 
d) slit growth 

Answer: eutrophic

Questions 25.The large quantity of domestic sewage  are continuously emptied into the small  stream  it will be lead  ?
a) deleption of oxygen content in stream  water 
b) density high
c) highe temperature 
d) algal blooms 

Answer: deleption of oxygen content in stream water 

Question 26.Which of the following are biodegradable pollution ?
a) sewage 
b) stream 
c)  lake 
d) river 

Answer: sewage 

Questions 27.which of the following due to phospahte pollution ? 
a) sewage and agriculture 
b)  due to automobile smoke 
c) due to excess of oxygen 
d)  high of temperature 

Answer: sewage and agriculture 

Questions 28. Which of the following is the main factors of water pollution ?
a) industrial waste
b) presence of viruses in water 
c) presence of water in most air 
d) presence of  mixture molecules 

Answer: industrial waste 

Questions 29.sewage water can be purfied  for recycling with action of ?
a) to use  microorganisms
b)  to use sulphuric acid
c)  to use  antibiotics 
d)  to use  Biochemical oxygen Demand

Answer: to use  microorganisms

Questions30: Which of the following due to eutrophication ?
a) pesticides 
b) chemical reaction
c) oxygen Demand
d) nitrate and phosphate

Answer: nitrate and phosphate