Draw illustrations to bring out anatomical difference between
(a) Monocot root and dicot root
(b) Monocot stem and dicot stem

Dicot root and Monocot root

A conjoint and open vascular bundle will be observed in the transverse section of (A) Monocot root (B) Monocot stem (C) Dicot stem (D) dicot root

Two beams of light havin intensities I and 4I interferer to produce a fringe pattern on a screen. The phase difference between the beam is (pi)/(2) at point A and 2pi at point B. then find out the difference between the resultant intensities at A and B.

Cut a transverse section of young stem of a plant from your school garden and abserve it under the microscope. How would ascertain wheater it is a monocot stem or a dicot stem ? Give reasons.