Question
Biology Question on The Stem
Raphides are the crystals of
A
calcium oxalate
B
calcium
C
calcium phosphate
D
calcium carbonate.
Answer
calcium oxalate
Explanation
Solution
Calcium oxalate crystals are present in raphides of almost all the plants organs and are particularly common in storage organs, pith and cortical tissues. 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, Eichornia, etc.).