Biological classification is a dynamic and ever evolving phenomenon which keeps changing with our understanding of life forms. Justify the statement taking any two examples.

Chemical reactions involve interaction of atoms and molecules. A large number of atoms and molecules (approximately 6.022 xx 10^(23) ) are present in a few grams of any chemical compound varying with their atomic/molecular masses. To handle such a large number conveniently, the mole concept was introduced. This concept has implications in diverse areas such as analytical chemistry, biochemistry, electrochemistry and radiochemistry. The following example illustrate a typical case involving chemical/electrochemical reaction which requires a clear understanding of mole concept. A 4.0 molar aqueous solution of NaCl is prepared and 500 mL of the solution is electrolyzed. This lead to the evolution of chlorine gas at one of the electrodes (atomic mass : Na = 23 , Hg = 200 , 1F = 96500 C) The total number of moles of chlorine gas evolved is :

Chemical reaction involve interaction of atoms and molecules. A large number of atoms/molecules (approximately 6.022xx10^(23) )are present in a few grams of any chemical compound varying with their atomic/molrcular mass. To handle such a large numbers conveniently, the mole concept was introduced. This concept has implications in diverse areas such as analytical in diverse areas such as analytical chemistry, biochemistry, electrochemistry and radiochemistry. The following example illustrates a typical case, involving chemical/ electrochemical reaction, which requires a clear understanding of the mole concept. A 4.0 molar aqueous solution of NaCl is prepared and 500 mL of this solution is electrolysed. This leads to the evolution of chlorine gas at one of teh electrodes (atomic mass: Na=23, Hg=200, 1F=96500 coulombs) The total number of moles of chlorine gas evolved is

Given below are certain biological statements which are incomplete and hence incorrect. Rewrite the correct form of the statement by inserting suitable word/words at right place. Do not delete any word already given in the statement. Underline the inserted word/words. More transpiration occurs from the dorsiventral leaf.

Given below are certain biological statements which are incomplete and hence incorrect. Rewrite the correct form of the statement by inserting suitable word/words at right place. Do not delete any word already given in the statement. Underline the inserted word/words. Guttation is the loss of water along the margins of leaves

Given below are certain biological statements which are incomplete and hence incorrect. Rewrite the correct form of the statement by inserting suitable word/words at right place. Do not delete any word already given in the statement. Underline the inserted word/words. Transpiration is the loss of water from the leaves of a plant.

Given below are certain biological statements which are incomplete and hence incorrect. Rewrite the correct form of the statement by inserting suitable word/words at right place. Do not delete any word already given in the statement. Underline the inserted word/words. The opening and closing of stomata is controlled by guard cells.

Given below are certain biological statements which are incomplete and hence incorrect. Rewrite the correct form of the statement by inserting suitable word/words at right place. Do not delete any word already given in the statement. Underline the inserted word/words. Bleeding is the exudation of sap or watery solution from the parts of a plant.