Multiple Choice QuestionsThe Great Barrier Reef along the east coast of Australia can be categorised as
population
community
ecosystem
biome.
Which one of the following is a pair of endangered species
Garden lizard and Mexican poppy
Rhesus monkey and Sal tree
Indian peacock and carrot grass
Hornbill and Indian aconite
Which one of the following is a matching pair of a drug and its category
Amphetamines - stimulant
Lysergic acid dimethyl amide - narcotic
Heroin - psychotropic
Benzodiazepine - pain killer
A baby has been born with a small tail. It is a case exhibiting
retrogressive evolution
mutation
atavism
metamorphosis
Which one of the following is correctly matched regarding an Institute and its location
National Institute of Virology - Pune
National lnstitute of Communicable Diseases - Lucknow
Central Drug Research Institute - Kasauli
National Institute of Nutrition - Mumbai
Electron beam therapy is a kind of radiation therapy to treat
Enlarged prostrate gland
Gall bladder stones by breaking them
Certain types of cancer
Kidney stones.
Severe Acute Respiratory Syndrome (SARS)
is caused by a variant of Pneumococcus pneumonia
is caused by a variant of the common cold virus (coronavirus)
is an acute form of asthma
affects non-vegetarians much faster than the vegetarians
Cattle fed with spoilt hay of sweet clover which contains dicumarol
are healthier due to a good diet
catch infections easily
may suffer vitamin K deficiency and prolonged bleeding
may suffer from beri beri due to deficiency of B vitamins.
C.
may suffer vitamin K deficiency and prolonged bleeding
During the process of spoiling, the coumarins in sweet clover are converted to toxic dicumarol, a potent vitamin K antagonist and anticoagulant. Any method of hay storage that allows molding of sweet clover promotes the likelihood of formation of dicumarol in the hay. Weathered, large round bales, particularly the outer portions, usually contain the highest concentrations of dicumarol.
When toxic hay or silage is consumed for several weeks, dicumarol alters proenzymes required for synthesis of prothrombin, resulting in hypoprothrombinemia (by preventing formation of the active enzyme). It probably also interferes with synthesis of factor VII and other vitamin K–dependent coagulation factors. Dicumarol concentrations of 20–30 mg/kg of hay ingested throughout several weeks are usually required to cause poisoning in cattle.
The toxic agent crosses the placenta in pregnant animals, and newborn animals may be affected at birth. All species of animals studied are susceptible, but instances of poisoning involve cattle and, to a limited extent, sheep, pigs, and horses.
If the Bengal Tiger becomes extinct
hyenas and wolves will become scars
the wild areas will be safe for man and domestic animals
its gene pool will be lost forever
the populations of beautiful animals like deers will get stabilized.
Nitrogen oxides produced from the emission of automobiles and power plants, are the source of fine air borne particles which lead to
photochemical smog
dry acid deposition
industrial smog
wet acid deposition
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