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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Bark formed towards the end of the season is called ________ bark.

  1. Soft
  2. Hard
  3. Turbid
  4. Rigid
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The exchange of gases between the outer atmosphere and internal tissue of stem is through ___________.

  1. Lenticels
  2. Legume
  3. Epidermis
  4. Cambium ring
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In a TS of lenticel arrange these in order (interior to exterior)
1. Secondary cortex
2. Epidermis
3. Cork cambium
4. Complementary cells
A. 1, 3, 4, 2
B. 1, 2, 3, 4
C. 1, 4, 3, 2
D. 4, 1, 2, 3

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In dicot root the vascular cambium is completely _________ in origin.

  1. Primary
  2. Secondary
  3. Tertiary
  4. Quaternary
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Which one yields fibres?

  1. Coconut
  2. Oak
  3. Teak
  4. Sisso
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High Yielding Test Series + Question Bank - NEET 2020

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