AP BIOLOGY

Detailed explanation-1: -(b) The experimental leaf is a dicot leaf as it shows reticulate venation and there are more number of stomatal openings on the undersurface of a dicot leaf. Hence, transpiration is more and can be easily observed.

Detailed explanation-2: -The leaf is a dicot as the cobalt chloride paper appears to be attached on the abaxial or lower surface of the leaf, where more number of stomata are present and therefore, more transpiration will take place. This will turn the blue paper pink.

Detailed explanation-3: -Dicot leaf is used in the experiment. This is because the dicot leaves possess reticulate venation and different levels of stomata in the two sides of the leaf.

Detailed explanation-4: -Reticulate venation is a characteristic of dicots and parallel venation is of monocots. But few exceptions are also seen in this generalisation parallel venation is Also found in dicot plants. e.g., Calophyllum, corymbium, etc., and reticulate venation is also found in monocot plants such Alocasia, Smilax, etc.

Detailed explanation-5: -Leaves of dicotyledonous plants possess reticulate venation while parallel venation is the characteristics of most monocotyledonous.