Class XI

Red blood cells (RBCs)
  1. Are permanent cells
  2. Can reproduce
  3. Have no nucleus
  4. Are biconvex
Cilia linning air passage is paralyzed due to
  1. Tar
  2. Irritants
  3. Nicotine
  4. Both A and B
Ultrafiltration retains
  1. Blood plasma
  2. Small molecules
  3. Small molecules
  4. Solid molecules
 Mechanisms to ensure male gametes meet female gametes include
  1. Pollination
  2. Fertilization
  3. Dispersion
  4. None of these
First genetically modified organism is generated in
  1. 1973
  2. 1990
  3. 1983
  4. 1989
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