Plasmolysis occurs in fungi and bacteria when they are kept in hypertonic solutions such as salt solution, sugar solution etc. Answer : (d)

Imbibants are the solid substance or adsorbent which take part in imbibition and the liquid that is imbibed is known as imbibate. Agar, a mixture of cell-wall polysaccharides including agarose and had a large number of hydroxyl groups causes adsorption of water compaired to any of the given option Answer : (b)

Guard cells are another specialized cell type that have an unusual but very characteristic cell wall morphology. The cellulose microfibrils are arranged radially around the cell, and this arrangement, known as radial micellation, is important for proper stomatal function. Answer : (c)

Waterlogging is the saturation of soil with water which excludes air from the groundwater. If waterlogging will be prolonged then air cannot reach up to groundwater and root and it will result in the stoppage of root respiration. So, the correct answer is 'Stoppage of root respiration'. Answer : (a)

Cells turgidity is due to turgor pressure. Turgor pressure is the pressure which develops in the confined part of an osmotic system due to osmotic entry of water into it. It is also called hydrostatic pressure or pressure potential. The force exerted by the cell wall over the protoplast is called wall pressure. Reason statement is not correct Normally wall pressure is equal and opposite to turgor pressure except when the cell becomes flaccid. Answer : (c)

Diffusion of water through selectively permeable membrane is Osmosis Answer : (c)

When transpiration is high, xylem sap is usually under tension, rather than under pressure, due to transpirational pull. Water then diffuses from the soil into the root xylem due to osmosis. Root pressure is caused by this accumulation of water in the xylem pushing on the rigid cells. Answer : (d)

Water potential of full turgid cells is zero. Fully turgid cell has the highest water potential . As water enters the cell the water apllies pressure against the walls of the cell. In the case of a fully turgid cell, no more water can enter the cell, thus it has the highest water potential. The pressure potential becomes equal to the solute potential in magnitude. The solute potential is negative and the pressure potential is postive. Answer : (a)

In tall trees water is absorbed due to Transpiration/suction pull Answer : (a)

Anthocyanin pigment cannot come out side due to impermeability of plasma membrane.Read more on Sarthaks.com - https://www.sarthaks.com/322755/when-beet-root-cylinders-are-washed-and-then-placed-cold-water-anthocyanin-does-not-come-out Answer : (b)

Wilting occurs when the rate of loss of water from the plant is greater than the absorption of water in the plant. Answer : (d)

Water flows from a region of lower DPD diffusion pressure deficit to higher DPD. When roots absorb water it moves from root hair cells to the root cortex cells. Answer : (c)

The four colligative properties are vapor pressure lowering, freezing point depression, boiling point elevation, and osmotic pressure Answer : (b)

Plants absorb water and minerals salt from the soil with the help of root hairs. They absorb water by the process of osmosis Answer : (c)

Movement of water from higher water potential to lower water potential through a semipermeable membrane is called Osmosis Answer : (a)

Plasmolysis is contraction of the protoplast of a plant cell as a result of loss of water from the cell. Exosmosis is the passage of a fluid through a semipermeable membrane toward a solution of lower concentration, especially the passage of water through a cell membrane into the surrounding medium Answer : (a)

Oozing out of water drops from injured edges or tips in plants is called bleeding Answer : (a)

Answer : (d)

Studies show that 9999% of the absorbed water is evaporated and the minute amount of water is used by the plants. Answer : (c)

tonicity is the relative concentration of solutes dissolved in solution which determine the direction and extent of diffusion. If the extracellular fluid has lower concentration of solutes than the fluid inside the cell, it's said to be hypotonic—hypo means less. a - iii Hypertonic have Higher tonicity b - iv Sucrose is solute when dissoled in waterSolute c - ii, d - i Answer : (d)

When concentration of solutes is low in the soil, absorption of water is will increases by the process of osmosis, Water flow from Hypotonic (lower concentration of solute) to Hypertonic solution ( More concentration of solute) Answer : (b)

Water always moves from the system with a higher water potential to the system with a lower water potential. Solute potential (ψs) decreases with increasing solute concentration; a decrease in Ψs causes a decrease in the total water potential. For cell A = -20 +8 = -12 For cell B = -12 +2 = -10 Water pressure of cell B is more than Cell A , therefore water flows from B to A Answer : (c)

Root pressure, in plants, force that helps to drive fluids upward into the water-conducting vessels (xylem). Answer : (b)

When RBC and a plant cell are placed in distilled water, endosmosis takes place in RBC as a result of which RBC would increase in size and burst, while the plant cell would remain about the same size because endosmosis is stopped due to the presence of rigid cell wall. Answer : (c)

Cohesion Tension Theory (Cohesion-Tension and Transpiration Pull Theory): The theory was put forward by Dixon and Joly in 1894. It was further improved by Dixon in 1914. Therefore, the theory is also named after him as Dixon's theory of ascent of sap Answer : (c)

Difference between Transpiration and Guttation. Transpiration occurs primarily through stomata and also through lenticels. Guttation occurs only through Hydathodes. In transpiration, water is lost in the form of water vapours Answer : (d)

During absorption of water by roots, the water potential of cell sap is lower than that of Pure water and soil solution Answer : (a)

Plasmolysis occurs when cells are kept in, this occurs when the cell is kept in a solution that is hypertonic (has more solutes) to the protoplasm. Answer : (b)

Wilting in plants occurs when Xylem is removed/blocked Answer : (b)

Potometer works on the principle of amount of water absorbed equals the amount of water transpired Answer : (b)