Question

1. Which type of leaf you will use to study comparative rates of transpiration? Why?​

Answer 1

Answer:

Compound leaf because this types of leaves are dotted with some pores called stomata .

Answer 2

The type of leaf you will use to study comparative rates of transpiration will be Dicot leaves.

• It is advised to use dicot leaves for studying the rates of transpiration in leaves.
• Dicot leaves have an unequal number of stomata present on both their surfaces.
• The upper part has very few stomata as compared to the lower part. Whereas monocot leaves have an equal number of stomata on both sides.
• Difference between the number of stomata on each side gives a better range of observations as to how the position and number of stomata influence the rate of transpiration.
• Leaves tilt in different manners and to different extents upon blocking each side of stomata in a dicot leaf. The basic rule of thumb is that the more the number of stomata blocked, the lesser it will transpire and tilt.
• Hence, upon blocking the lower surface of the dicot leaf with petroleum jelly, it will lose less water as compared to upper leaf blockage.