Given below is an apparatus used to study a particular process in plants. Study the same answer the questions that follow: i. Name the physiological process being studied. [1] ii. Name the antiseptic substance used in thermos-flask-B. What is the role of the antiseptic substance used? [1+1=2] iii. Why are the seeds placed in thermos-flak-B killed by boiling in water? [1] iv. What is the observation seen in the experiment after few hours?
Answers
Answer:
By the magnetic field equation inside a solenoid, increasing the number of turns per unit length (n) of the wire around the magnetizable material will increase the magnetic field applied to the magnetizable material. Increasing the magnetic field applied to the magnetizable material in turn makes its own magnetic field stronger.
Similarly, wrapping with thicker wire has the same effect, but by increasing the current. Like a widening river, a thicker conductor allows more current through.
Answer:
(i) Transpiration
(ii) Two cobalt chloride papers are attached, one on the dorsal and the other on the ventral surface of a dorsiventral leaf with the help of glass slide and clips. The set up is left in the open for few hours.
(iii) To show that more transpiration occurs from the ventral surface of a dicot leaf.
(iv) After an hour, the cobalt chloride paper placed on the ventral surface turns blue to pink faster than the one on the upper surface as the number of stomata are more on the ventral surface, so more transpiration takes place from the lower surface.
(v) 1. Cuticle becomes thick
2. Leaves become narrow
3. Stomata covered by hair-like structures