Class IX

Pneumatophores are the
  1. special spores produced in times of drought
  2. special breathing roots
  3. thick coverings on epidermis of leaves and shoots
  4. types of stomata helping reduce rate of transpiration
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
In willow trees, cotton wool is mostly made of
  1. air ducts
  2. air floats
  3. cellulose
  4. starch
First step in seed germination is
  1. passing through gut of an animal
  2. exploding along sutures
  3. absorption of water
  4. taking in of O2
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