Last seen: Jan 13, 2022
(c) If Assertion is correct but Reason is incorrect. Explanation: Sap is water with dissolved ingredients. The upward movement of water from roots...
Correct option: (d) Explanation: Root pressure is a pressure produced in the roots of plants, causing exudation of sap from cut stems and guttatio...
Correct option: (a) Explanation: The radial and the inner walls of the cells of the endodermis are greatly thickened. These are called as casparia...
Correct option: (a) Explanation: Waxy and cutin coating does reduce transpiration. This adaptive feature is seen in xerophytic and in plants of se...
(c) (iv) and (v) Explanation: Statements (iv) and (v) are not correct. (iv) Xylem is associated with the translocation of mainly water, mineral ...
(c) active transport Explanation: Active transport uses energy (ATP) to pump molecules against a concentration gradient. Cells undergoing active t...
(c) B to A, C and D Explanation: DPD = OP – TP. DPD (A) = 4 bar. DPD (B) = 0 bar. DPD (C) = 10 – 5 = 5 bars. DPD (D) = 7 – 3 = 4 bars....
(d) unable to control amounts of water and solutes it absorbs. Explanation: The casparian strips function in regulation of the flow of water betwe...
(a) Foliar feeding Explanation: Potassium is accumulated by passive transport. Some solutes are pumped across membranes using active transport. Th...
(c) Imbibition Explanation: Imbibition is the process of adsorption of water by hydrophilic surfaces of a substance without forming a solution. It...
(c) Simple diffusion
(d) 0 and less than 1
(c) Applying vaseline on the leaf surface Explanation: Excessive loss of water from the leaves can be prevented by applying vaseline on leaf surfa...
(a) 3Na+ and 2K+ are transported Explanation: During sodium-potassium pump, the concentration of sodium ions will be about 14 times more in extra ...
(c) soilless culture Explanation: Cultivation of plants by placing the roots in the nutrient solution without any soil is called hydroponics. It i...
(d) All of these Explanation: Upward movement of water (sap) through xylem against the force of gravity is called ascent of sap. All three help in...
(a) imbibition Explanation: In rainy season, door gets swelled due to the phenomenon of imbibition. It is the process of absorption of water witho...
(a) food Explanation: Phloem is the chief food conducting tissue of vascular plants responsible for translocation of organic solutes.
(a) active transport Explanation: Active transport is the mediated transport of biochemicals, and other atomic/ molecular substances, across membr...
(b) If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion. Explanation: Diplotene is the longest and mo...