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Sexual Reproduction in Flowering Plants — BIOLOGY STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 ScienceBIOLOGYSexual Reproduction in Flowering Plants3 Marks
Question
  1. Trace the development of an endosperm after fertilisation with reference to coconut. Mention the importance of endosperm development.
  2. Write the importance of 'pollen bank'.
✓

Answer

  1. In coconut Primary Endosperm Nucleus (PEN-3n) undergoes successive nuclear divisions, give rise to free- nuclear endosperm known as coconut water, white kernel is the cellular endosperm, provides nourishment to the growing embryo.
  2. Storage/cryopreservation (storage in liquid nitrogen at - 196 o C), to use in crop breeding programmes.

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