Class IX

Chyme is
  1. acidic in nature
  2. alkaline in nature
  3. has a pH of 7
  4. depends upon type of food eaten
Disadvantages of pesticides includes
  1. healthier crops
  2. higher yield of crops
  3. non-biodegradable pesticides
  4. more food is available
Viruses are not considered cells because
  1. they can not divide
  2. they do not have a nucleus
  3. they do not have a protoplasm
  4. they are non-living things
In terms of tolerance range for oxygen (O2), Tubifax worms and fish
  1. differ
  2. are alike
  3. are similar
  4. are opposite
Nicotine (C10H14N2)
  1. is a carcinogenic substance
  2. makes blood clot easily
  3. makes blood dilute
  4. helps in lumen becoming narrower
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