Class IX

Intine refers to the
  1. pollen tube germinating through style
  2. inner wall of mature pollen grain
  3. part connecting ovule with placenta
  4. fruit chambers in zygote
In willow trees, cotton wool is mostly made of
  1. air ducts
  2. air floats
  3. cellulose
  4. starch
Iron and bile pigments are released on breakdown of
  1. hemoglobin
  2. leucocytes
  3. platelets
  4. antibodies
With an increase in seed size upon germination, dry mass of seeds
  1. increases
  2. increases
  3. vanishes
  4. grows proportionally with seed
Sources of vitamin may include
  1. plant foods
  2. microorganisms living in gut
  3. meat and eggs
  4. both A and B
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