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271. The sum of genes in a population is called
  A.  Phenotype
  B.  Gene pool
  C.  Genetype
  D.  Karyotype
     
   
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272. 'Plague' is caused by
  A.  Bacteria
  B.  Protozoa
  C.  Virus
  D.  All of the above
     
   
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273. Which of the following is not an insectivorous plant?
  A.  Nepenthes
  B.  Drosera
  C.  Utricularia
  D.  Cuscuta
     
   
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274. Wings of a bird and an insect are
  A.  Homologous organs
  B.  Vestigial organs
  C.  Analogous organs
  D.  Rudimentary organs
     
   
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275. Seed dormancy is regulated by:
  A.  Gibberellic acid
  B.  Abscisic acid
  C.  Ethanoic acid
  D.  Indole acetic acid
     
   
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276. Smut of wheat is caused by:
  A.  Puccinia graminis
  B.  Ustilago maydis
  C.  Ustilago tritici
  D.  Colletotrichum falcatum
     
   
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277. Potential of air pollution incrases when the ventilation coefficient is
  A.  >11,000 m2/s
  B.  >7,600 m2/s
  C.  <3,600 m2/s
  D.  <6,000 m2/s
     
   
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278. The ambient air quality standard for lead in industrial area is
  A.  0.65 µg/m3
  B.  1.5 µg/m3
  C.  1.0 µg/m3
  D.  0.75 µg/m3
     
   
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279. Which one of the following hormone is called 'Emergency hormone'?
  A.  Adrenaline
  B.  Thyroxine
  C.  Vasopressin
  D.  Insulin
     
   
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280. Malaria is transmitted form one person to another by:
  A.  Aedes Mosquito
  B.  Culex Mosquito
  C.  Anopheles Mosquito
  D.  All of the above
     
   
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