question_answer 60)

  You are provided with the seeds of gram, wheat, rice, pumpkin, maize and pea. Classify them whether they are monocot or dicot.

Answer:

  On the basis of number of cotyledons, the angiosperms are divided into (a) Dicotyledonae (Dicots) (i) The seeds produced by these plants have embryos with two fleshy cotyledons. (ii) Their leaves have reticulate venation, with a network of veins and veinlets. (iii) The root system has a prominent tap root. (iv) The flowers have five or multiple of five petals. (v) The vascular bundles are arranged in a ring. They are open (i.e., have cambium) between xylem and phloem and undergo secondary growth. (b) Monocotyledonae (Monocots) (i) The seeds of these plants have only one cotyledon. (ii) Their leaves have parallel venation. (iii) The root system consists of similar fibrous roots. (iv) The flowers have three or multiple of three petals. (v) The vascular bundles are scattered and closed, (i.e., lack cambium). Secondary growth does not occur. Out of the given example seeds of maize, wheat and rice are monocots,