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Anatomy of Flowering Plants — BIOLOGY STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceBIOLOGYAnatomy of Flowering Plants3 Marks
Question
Answer the following questions with reference to the anatomy of dicot stem
  1. Type of cells present in the hypodermis.
  2. Why is the endodermis layer referred to as starch sheath?
  3. Why are the vascular bundles present here referred to as 'open' and 'conjoint'?
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Answer

  1. Collenchyma.
  2. Since the endodermal cells are rich in starch grains, it is referred to as starch sheath.
  3.  
  • The vascular bundle is referred to as 'open'; because it possesses cambium that has the ability to produce secondary xylem and secondary phloem tissues, i.e. secondary growth.
  • The vascular bundle is referred to as 'conjoint' because the xylem and phloem are situated along the same radius in the vascular bundle.

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