The primary and secondary phloem gets gradually crushed due to the continued formation and accumulation of _________.

  1. Secondary xylem
  2. Resin
  3. Wax
  4. Bark
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In dicot stem, at some places the cambium forms a narrow band of parenchyma which passes through the secondary xylem and secondary phloem in radial direction these are called _________.

  1. Secondary medullary rays
  2. Rays
  3. Primary medullary rays
  4. Tertiary medullary rays
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The wood formed during spring is called

  1. Early wood
  2. Late wood
  3. Autumn wood
  4. Summer wood
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The wood formed during winter is called

  1. Early wood
  2. Spring wood
  3. Autumn wood
  4. Intermediate wood
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Annual ring appears due to

  1. Radial xylem
  2. Radial phloem
  3. Centric wood
  4. Alternate concentric rings
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The region of secondary xylem which comprise dead element with highly lignified walls is called

  1. Casparian strip
  2. Heartwood
  3. Sapwood
  4. Bark
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The peripheral region of secondary xylem lighter in colour is

  1. Sapwood
  2. Heartwood
  3. Annular wood
  4. Bark wood
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Cork cambium is also called

  1. Phellogen
  2. Annular ring
  3. Early wood
  4. Late wood
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Phellogen, phellem and phelloderm are collectively known as

  1. Phellogram
  2. Periderm
  3. Cork
  4. Phalanges
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Bark that is formed early in season is called __________ bark.

  1. Hard
  2. Soft
  3. Turbid
  4. Lenticels
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