Raphides are the crystals of (a) calcium oxalate (b) calcium
Raphides are the crystals of
(a) calcium oxalate
(b) calcium
(c) calcium phosphate
(d) calcium carbonate
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The correct option is: (a) calcium oxalate
Explanation:
Calcium oxalate crystals are present in raphides of almost all the plants organs and are particularly common in storage organs, pith and cortical tissues. They are generally present in idioblasts i.e. mucilage containing cells. The shape of the crystal is variable. Needle like or acicular crystal called raphides are found in aroids (e.g., Colocasia, Amorphophallus, Impatiens) and many aquatic plants (e.g., Pistia, Eithornia etc ).
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