McqMate
Chapters
| 1. |
Match A and B :
|
| A. | (v) (iii) (i) (iv) |
| B. | (i) (ii) (iii) (v) |
| C. | (v) (ii) (i) (iv) |
| D. | (iii) (v) (ii) (i) |
| Answer» C. (v) (ii) (i) (iv) | |
| 2. |
The pressure at which the entry of water across the semipermiable membrane stops is called ..... |
| A. | Turgor pressur |
| B. | Root pressure |
| C. | Osmotic pressure |
| D. | Diffusion pressure |
| Answer» C. Osmotic pressure | |
| 3. |
What happens in this figure ? |
| A. | Water from beaker will enter the thistle funnel. |
| B. | Water from thistle funnel will enter in the beaker. |
| C. | Nacl enter from beaker to thistle funnel. |
| D. | Osmosis does not occur. |
| Answer» D. Osmosis does not occur. | |
| 4. |
A .......... force exists between the walls of xylem vessels and water. |
| A. | Cohesion |
| B. | Gravitational |
| C. | Adhesive |
| D. | Transpiration pull |
| Answer» C. Adhesive | |
| 5. |
The process by which water is forcibly pushed beyond endodermis of root is known as ......... . |
| A. | Apoplast pathway |
| B. | Symplast pathway |
| C. | Diffusion |
| D. | Transmembrane transport |
| Answer» D. Transmembrane transport | |
| 6. |
By which type of transpiration largest amount of water is lost ? |
| A. | Guttation |
| B. | Cuticular |
| C. | Stomata |
| D. | Lenticular |
| Answer» C. Stomata | |
| 7. |
The value of osmotic pressure depends on .......... . |
| A. | Concentration of solute |
| B. | Concentration of solvent |
| C. | Concentration of solution |
| D. | Concentration of substrate |
| Answer» C. Concentration of solution | |
| 8. |
If the external solution is more dilute than the cytoplasm is known as .......... . |
| A. | Hypertonic |
| B. | Hypotonic |
| C. | Isotonic |
| D. | ‘a’ and ‘b’ both |
| Answer» B. Hypotonic | |
| 9. |
Membrane protein is responsible for transport of |
| A. | Water molecule |
| B. | Transpiration of H2O |
| C. | Active transport |
| D. | Passive transport |
| Answer» C. Active transport | |
| 10. |
The +ve value of Ψ P is called .......... |
| A. | Osmotic pressure |
| B. | Root pressure |
| C. | Turgor pressure |
| D. | Imbibation pressure |
| Answer» C. Turgor pressure | |
| 11. |
What happens in this figure ? |
| A. | Exo osmosi |
| B. | Endo osmosis |
| C. | Cell swollen |
| D. | Cell remain in same condition |
| Answer» D. Cell remain in same condition | |
| 12. |
In older dying leaves to younger leaves the mineral ions are assimilated into .......... . |
| A. | In organic compound |
| B. | Organic compound |
| C. | Deposition of Inorganic compound and organic compou |
| Answer» B. Organic compound | |
| 13. |
Which elements are readily mobilized in plants ? |
| A. | S, N, Mo |
| B. | K, N, Mo |
| C. | P, S, N |
| D. | S, N, B |
| Answer» C. P, S, N | |
| 14. |
In term of fixing CO2, C4 plants are .......... efficient as C3 plants. |
| A. | Thrice |
| B. | Twice |
| C. | Less |
| D. | Not |
| Answer» B. Twice | |
| 15. |
When a cell is placed in 0.50M concentrated sugar solution, there is no change in it. So the external solution is called .......... . |
| A. | Hypertonic |
| B. | Isotonic |
| C. | Hypotonic |
| D. | Colloidal |
| Answer» B. Isotonic | |
| 16. |
The pressure that prevails in cell due to number of substances dissolved in cell sap is .......... . |
| A. | Wall pressure |
| B. | Turgor pressure |
| C. | Osmotic pressure |
| D. | Diffusion pressure |
| Answer» C. Osmotic pressure | |
| 17. |
The plasmolysed cells regain turgidity and assume original volume under infuence of hypotonic solution. The process is called |
| A. | Plasmolysi |
| B. | Deplasmolysis |
| C. | Endo osmosis |
| D. | Exo osmosis |
| Answer» B. Deplasmolysis | |
| 18. |
An animalcell placed in pure water will |
| A. | Swell up and brust |
| B. | Shrink and die |
| C. | Shrink and undergo plasmolysis |
| D. | Swell up and develop turgidity |
| Answer» A. Swell up and brust | |
| 19. |
Passage of water across a selectively permeable membrane is |
| A. | Active transport |
| B. | Pinocytosis |
| C. | Facilitated difusion |
| D. | Osmosis |
| Answer» D. Osmosis | |
| 20. |
Seeds placed in water imbibe the water becasue of |
| A. | Exosmosi |
| B. | Higher Ψ W |
| C. | Lower Ψ W |
| D. | Pressure of vacuoles |
| Answer» C. Lower Ψ W | |
| 21. |
In thistle funnel experiment, entry of water into thistle funnel stops after some time automatically due to |
| A. | Diffusion of sugar out of thistle funnel. |
| B. | External and internal solutions become isotonic. |
| C. | Development of hydrostatic pressure in the thistle funnel. |
| D. | Development of hydrostatic pressure in the beaker. |
| Answer» C. Development of hydrostatic pressure in the thistle funnel. | |
| 22. |
In plants the process in which loss of water occurs in form of water vapour is |
| A. | Respiration |
| B. | Guttation |
| C. | Transpiration |
| D. | Exosmosis |
| Answer» C. Transpiration | |
| 23. |
Stomatal aperature is surrounded by guard cells and opens when guard cells are |
| A. | Flaccid |
| B. | Turgid |
| C. | Bean shaped |
| D. | Dumb-bell shaped |
| Answer» B. Turgid | |
| 24. |
Stomatal frequency indicates. |
| A. | Number of stomata per unit area |
| B. | Rate of water loss |
| C. | Rate of gaseous exchange |
| D. | Width of stomatal aperature |
| Answer» A. Number of stomata per unit area | |
| 25. |
In dorsiventral leaf, the number of stomata per unit area are generally. |
| A. | Same on both the surface |
| B. | More on lower surface (epidermis) |
| C. | More on upper surface (epidermis) |
| D. | Absent on upper surface |
| Answer» B. More on lower surface (epidermis) | |
| 26. |
In isobilateral leaf, the number of stomata per unit area are. |
| A. | More on upper surface |
| B. | More on lower surface |
| C. | Approximately same on both the surfaces |
| D. | Absent on both the surfaces |
| Answer» C. Approximately same on both the surfaces | |
| 27. |
The loss of water in form of water drops is called. |
| A. | Transpiration |
| B. | Respiration |
| C. | Guttation |
| D. | Exosmosis |
| Answer» C. Guttation | |
| 28. |
Transpiration is unavoidable evil because of |
| A. | Structure of leaf and harmful effect |
| B. | Beneficial and harmful effect. |
| C. | Maintenance of turgidity for growth |
| D. | Gaseous exchange for photosynthesis and respiration |
| Answer» D. Gaseous exchange for photosynthesis and respiration | |
| 29. |
Plants with scotoactive stomata perform |
| A. | C4 photosynthesi |
| B. | CAM photosynthesis |
| C. | C3 photosynthesis |
| D. | An oxygenic photosynthesis |
| Answer» B. CAM photosynthesis | |
| 30. |
For keeping stomata open, besides K+ ions the guard cells require a constant supply of |
| A. | ABA |
| B. | ATP |
| C. | Organic acid |
| D. | Protons |
| Answer» B. ATP | |
| 31. |
Transpiration is a process related to |
| A. | Osmosi |
| B. | Diffusion |
| C. | Activated transport |
| D. | Facilitated diffusion |
| Answer» B. Diffusion | |
| 32. |
Rate of transpiration is inversely related to |
| A. | Humidity |
| B. | Light |
| C. | Temperature |
| D. | Water |
| Answer» A. Humidity | |
| 33. |
Scotoactive movement of stomata is that |
| A. | Stomata open at night |
| B. | Stomata open during day |
| C. | Stomata close at night |
| D. | Stomata open both during day and night |
| Answer» A. Stomata open at night | |
| 34. |
The most effective light for stomatal opening is_____________ |
| A. | Yellow |
| B. | Green |
| C. | Red |
| D. | Blue |
| Answer» D. Blue | |
| 35. |
During high wind velocity, the stomata |
| A. | open more widely |
| B. | Close down |
| C. | Remian unaffected |
| D. | Remain unaffected but lose more water due to mass action |
| Answer» B. Close down | |
| 36. |
Cobalt chloride is blue in dry state. In contact with moisture, it turns in to |
| A. | Yellow |
| B. | Pink |
| C. | Red |
| D. | Green |
| Answer» B. Pink | |
| 37. |
The maximum absorption of water by roots occurs in the (region) zone of |
| A. | Root cap |
| B. | Cell division |
| C. | Cell elongation |
| D. | Root hairs |
| Answer» D. Root hairs | |
| 38. |
The movement of water is along |
| A. | Turgor gradien |
| B. | DPD gradient |
| C. | Diffusion gradient |
| D. | Osmotic gradient |
| Answer» B. DPD gradient | |
| 39. |
As absorbed water passes towards vascular cylinder, it must enter the cytoplasm of |
| A. | Pericycle cell |
| B. | Endodermal cells |
| C. | Cortical cells |
| D. | Xylem parenchyma |
| Answer» B. Endodermal cells | |
| 40. |
Water tightly held to soil particles is called (EAMCET 1996) |
| A. | Bound water |
| B. | Capillary water |
| C. | Hygroscopic water |
| D. | Runaway water |
| Answer» C. Hygroscopic water | |
| 41. |
The phenomenon which forces water upward into tracheal elements of xylem in the root region is |
| A. | Transpiration |
| B. | Root pressure |
| C. | Turgor pressure |
| D. | Imbibation pressure |
| Answer» B. Root pressure | |
| 42. |
Force for passive water absorption develops in |
| A. | Xylem |
| B. | Aerial parts |
| C. | Root |
| D. | Root hairs |
| Answer» B. Aerial parts | |
| 43. |
The phenomenon related to active water absorption is |
| A. | Transpiration |
| B. | Root pressure |
| C. | Osmotic pressure |
| D. | Translocation |
| Answer» B. Root pressure | |
| 44. |
Root pressure can be demonstrated by means of |
| A. | wilting |
| B. | Guttation |
| C. | Transpiration |
| D. | Exudation |
| Answer» D. Exudation | |
| 45. |
Root pressure theory of ascent of sap is unacceptable because |
| A. | Water can ascend without root or root pressure |
| B. | Root pressure cannot explain ascent of sap beyond 10 metres. |
| C. | Root pressure is more during early morning than afternoon. |
| D. | Root pressur does not occur in spring. |
| Answer» A. Water can ascend without root or root pressure | |
| 46. |
Transpiration cohesion theory explains that the upwards pull of water is transmitted from top to bottom by cohesion of molecules caused by |
| A. | Hydrophilic cell wall |
| B. | Hydrogen bonds |
| C. | Oxygen bonds |
| D. | Surface tension |
| Answer» B. Hydrogen bonds | |
| 47. |
Root pressure is unable to explain the ascent of sap because it is not found in |
| A. | Bryophyte |
| B. | All plants in all reasons |
| C. | Trees |
| D. | Spring |
| Answer» A. Bryophyte | |
| 48. |
Ascent of sap is |
| A. | Upward movement of water in the plant |
| B. | Downward movement of organic nutrients |
| C. | Upward and downward movement of water in the plant |
| D. | Redistribution of inorganic substances in the plant |
| Answer» D. Redistribution of inorganic substances in the plant | |
| 49. |
In xylem, the ascent of sap takes place in |
| A. | Tracheids with associated xylem parenchyma |
| B. | Xylem parenchyma |
| C. | Walls of tracheary elements |
| D. | Lumen of tracheary elements |
| Answer» B. Xylem parenchyma | |
| 50. |
Swelling of wooden frames during rains is caused by |
| A. | Endo osmosi |
| B. | Imbibation |
| C. | Capillarity |
| D. | Osmosis |
| Answer» A. Endo osmosi | |
| 51. |
Dry seeds when placed in waeter swell up due to |
| A. | Imbibition |
| B. | Absorption |
| C. | Diffusion |
| D. | Adsorption |
| Answer» B. Absorption | |
| 52. |
A cell is plasmolysed after being kept in hypertonic solution. What will be present between cell wall and plasmalemma ? |
| A. | Isotonic solution |
| B. | Hypertonic solution |
| C. | Air |
| D. | Hypotonic solution |
| Answer» D. Hypotonic solution | |
| 53. |
Raisins placed in water swell up due to (CPMT 1988, KCET 2008) |
| A. | Plasmolysi |
| B. | Adsorption |
| C. | Diffusio |
| D. | Endo osmosis |
| Answer» C. Diffusio | |
| 54. |
Root hairs absorb water from soil when (AFMC 1988, JIPMER 1986) |
| A. | Osmotic concentration is same in the two |
| B. | Solute concentration is higher in soil solution |
| C. | Solute concentration is higher in root hairs |
| D. | Absorption is active |
| Answer» D. Absorption is active | |
| 55. |
A cell placed in strong salt solution will shrink because (JIPMER 1986) |
| A. | Cytoplasm will decompose |
| B. | Mineral salts will break the cell wall |
| C. | Salt water enters the cell |
| D. | Water comes out by exoosmosis |
| Answer» A. Cytoplasm will decompose | |
| 56. |
Osmosis defined as |
| A. | Flow of solvent (water) through a semipermiable membrane from less concentrated solution to more concentrated solution. |
| B. | Flow of solute from a semipermeable membrane |
| C. | Flow of water without a membrane |
| D. | None ot the above |
| Answer» A. Flow of solvent (water) through a semipermiable membrane from less concentrated solution to more concentrated solution. | |
| 57. |
A cell increase in volume if the external medium is (Har. PMT 2005) |
| A. | Hypotonic |
| B. | Hypertonic |
| C. | Isotonic |
| D. | None of the above |
| Answer» A. Hypotonic | |
| 58. |
If a cell gets reduced in size when placed in solution, the solution is (CPMT 1988, AFMC 2009) |
| A. | Hypertonic |
| B. | Hypotonic |
| C. | Weak |
| D. | Saturated |
| Answer» A. Hypertonic | |
| 59. |
In a hypertonic solution a cell’s water potential |
| A. | Decrease |
| B. | Increases |
| C. | First increases then decreases |
| D. | No change |
| Answer» A. Decrease | |
| 60. |
An example of selectively permeable membrane is (CPMT 1988) |
| A. | Plasmalemma |
| B. | Cell wall |
| C. | Mitochondrial membrane |
| D. | Chloroplast membrane |
| Answer» B. Cell wall | |
| 61. |
When beet root cylinders are washed and then placed in cold water, anthocyanin does not come out. This indicates that most likely the plasma membrane is (AFMC 1990) |
| A. | Permeable to enthocyanin |
| B. | Impermeable to anthocyanin |
| C. | Differentially permeable to anthocyanin |
| D. | Dead structure |
| Answer» D. Dead structure | |
| 62. |
Water potential is equal to (CBSE 1988, AMV 1997) |
| A. | Ψ S + OP |
| B. | Ψ S = TP |
| C. | Ψ P + Ψ W |
| D. | Ψ P + Ψ W |
| Answer» D. Ψ P + Ψ W | |
| 63. |
Purple cabbage leaves do not pass out colour in cold water but do so in hot water becasue (AFMC 1988) |
| A. | Hot water enters the cell faster |
| B. | Pigment is not soluble in cold water |
| C. | Hot water destroys cell walls |
| D. | Hot water kills plasmalemma and makes it permeable |
| Answer» A. Hot water enters the cell faster | |
| 64. |
Which one option does not involve osmosis ? (MPPMT 1991) |
| A. | Water passing from one xylem element to the other above it. |
| B. | Water passing from soil to root hair |
| C. | Water passing into mesophyll cell from xylem |
| D. | Water passing from root hair cell to cortical cell |
| Answer» B. Water passing from soil to root hair | |
| 65. |
A bottle filled with previously moistened mustard seeds and water was screw capped tightly and kept in a corner. It blew up suddenly after about half an hour. The phenomenon involved is |
| A. | Diffusion |
| B. | Imbibition |
| C. | Osmosis |
| D. | DPD (CBSE 1990) |
| Answer» B. Imbibition | |
| 66. |
When concentration of solutes is low in the soil, absorption of water is (CMPT 1987, KCET 2007) |
| A. | Stopped |
| B. | Increased |
| C. | Retarded |
| D. | Normal |
| Answer» D. Normal | |
| 67. |
Guard cells differ from epidermal cells in having. (CPMT 1993, CBSE 2011) |
| A. | Mitochondria |
| B. | Vacuoles |
| C. | Cell wall |
| D. | Chloroplast |
| Answer» B. Vacuoles | |
| 68. |
Wilting in plants occurs when (CPMT 1987, 1991, 2002, AFMC 2005, BHU 2006, WB 2008) |
| A. | Phloem is blocked |
| B. | Xylem is removed / blocked |
| C. | Pith is removed |
| D. | A few leaves are removed |
| Answer» B. Xylem is removed / blocked | |
| 69. |
Guttation is the process of elimination of water from plants through (BHU 1986, JIPMER 1987, MPPMT 1995, Orissa 2003) |
| A. | Stomata |
| B. | Hydathodes |
| C. | Lenticels |
| D. | Wounds |
| Answer» D. Wounds | |
| 70. |
What is the action spectrum of transpiration ? (RPMT 1995, CET Chd. 2006) |
| A. | Green and ultraviolet |
| B. | Orange and red |
| C. | Blue and far red |
| D. | Blue and red |
| Answer» A. Green and ultraviolet | |
| 71. |
Stomata open during day time because the guard cells (CPMT 1987) |
| A. | Produce osmotically active sugars or organic acids |
| B. | Are thin walled |
| C. | Are bean shaped |
| D. | Have to help in gaseous exchange |
| Answer» D. Have to help in gaseous exchange | |
| 72. |
Stomatal opening is under the control of (KCET 1988, Manipur 2005) |
| A. | Epidemal cell |
| B. | Pallisde cells |
| C. | Spongy cells |
| D. | Guard cells |
| Answer» B. Pallisde cells | |
| 73. |
Maximum transpiration takes place from |
| A. | Stem |
| B. | Leaves |
| C. | Roots |
| D. | Flowers and fruits |
| Answer» B. Leaves | |
| 74. |
It is produced during water stress that brings stomatal closure. (AMU 1992, CBSE 1993, 1994, 2001, RPMT 2000, JIPMER 2000, Orissa 2009, MP PMt 1992) |
| A. | Ethylene |
| B. | Abscisic acid |
| C. | Ferulic acid |
| D. | Coumarin |
| Answer» D. Coumarin | |
| 75. |
Transpiration is least in (CBSE 1998, BHU, 1987, KCET 2006) |
| A. | Good soil moisture |
| B. | Hight wind velocity |
| C. | Dry environment |
| D. | High atmospheric humidity |
| Answer» C. Dry environment | |
| 76. |
Transpiration is high in (MP PMT 1993) |
| A. | Rainy season |
| B. | Winter |
| C. | High temperature |
| D. | Low wind velocity |
| Answer» D. Low wind velocity | |
| 77. |
Potometer is an instrument that measures (Pb. PMT 1998, Manipur 2005) |
| A. | Respiration |
| B. | Photosynthesis |
| C. | Growth |
| D. | Transpiration |
| Answer» D. Transpiration | |
| 78. |
Wilting appears due to excessive. (MP PMT 1989, RPMT 2000, AFMC 2001, Pb. PMT 2001) |
| A. | Respiration |
| B. | Photosynthesis |
| C. | Absorption |
| D. | Transpiration |
| Answer» A. Respiration | |
| 79. |
Transpiration is regulated by movement of (JIMER 2004) |
| A. | Guard cell |
| B. | Subsidiary cells |
| C. | Epidermal cells |
| D. | Mesophyll cells |
| Answer» B. Subsidiary cells | |
| 80. |
Rate of transpiration is reduced with (CPMT 1987, MPPMT 1999) |
| A. | Rise in temperature |
| B. | Decrease in light intensity |
| C. | Increase in wind velocity |
| D. | Increase in water uptake |
| Answer» B. Decrease in light intensity | |
| 81. |
In terrestrial habitats, temperature and railfall conditions are influenced by (CBSE 1989) |
| A. | Water transformation |
| B. | Transpiration |
| C. | Thermoperiodism |
| D. | Translocation |
| Answer» A. Water transformation | |
| 82. |
Conversion of starch to organic acids is required for (CBSE 1992) |
| A. | Stomatal opening |
| B. | Stomatal closing |
| C. | Stomatal formation |
| D. | Stomatal activity |
| Answer» C. Stomatal formation | |
| 83. |
Element involved in stomatal regulation its opening and closing is(CPMT 1989, 2004, Kerala 2000, Manipal 2001, Pb. PMT 2001, Uttrakhant 2001, DPMT 2002, Wardha 2003, 2011, AMU 2005) |
| A. | Zinc |
| B. | Magnesium |
| C. | Potassium |
| D. | Iron |
| Answer» A. Zinc | |
| 84. |
In guard cells when sugar is converted into starch, the stomatal pore (CBSE 1997) |
| A. | Closed completely |
| B. | Opens partiall |
| C. | Opens fully |
| D. | Remains unchanged |
| Answer» A. Closed completely | |
| 85. |
Water will be absorbed by root hairs when the externael medium is (JIPMER 1986, AFMC 1993) |
| A. | Hypotonic |
| B. | Hypertonic |
| C. | Isotonic |
| D. | Viscous |
| Answer» C. Isotonic | |
| 86. |
Root hairs occur in the zone of (Kerala 2003) |
| A. | Cell division |
| B. | Cell elongation |
| C. | Cell maturatio |
| D. | Mature cells |
| Answer» C. Cell maturatio | |
| 87. |
Path of water movement from soil to xylem is (CPMT 1989, Kerala 2008) |
| A. | Meta xylem - protoxylem - cortex - soil - roothair |
| B. | Cortex - root hair - endodermis - pericycle - protoxylem - meta xylem |
| C. | Soil - root hair - cortex - endodermis - pericycle - protoxylem - meta xylem |
| D. | Pericycle - soil - root hair - cortex endodermis - protoxylem metaxylem |
| Answer» C. Soil - root hair - cortex - endodermis - pericycle - protoxylem - meta xylem | |
| 88. |
Water in plants is transported by or ascent of sap takes place through (BHU 1991, DPMT 1987, CPMT 1983, 1996, MHTCET 2009) |
| A. | Cambium |
| B. | Phloem |
| C. | Xylem |
| D. | Epidermis |
| Answer» A. Cambium | |
| 89. |
Water rises in the stem due to (RPMT 2000) |
| A. | Cohesion and transpiration pull |
| B. | Turgor pressure |
| C. | Osmotic pressure |
| D. | Root pressure (negative) |
| Answer» C. Osmotic pressure | |
| 90. |
The principal pathway of water translocation in angiospermis is (CBSE 1990) |
| A. | Sieve cell |
| B. | Sieve tube elements |
| C. | Xylem vessel system |
| D. | Xylem and phloem |
| Answer» B. Sieve tube elements | |
| 91. |
Which contributes most to the transport of water from soil to the leaves of a tree ? (CPMT 1989, MPPMT 1989) |
| A. | Root pressure |
| B. | Cohesion of water and transpiration pull |
| C. | Capillary rise of water inside xylem |
| D. | Hydrolysis of ATP |
| Answer» D. Hydrolysis of ATP | |
| 92. |
Cohesive force of water is due to (EAMCET 1989, EPMT 2005) |
| A. | O-bond |
| B. | OH-bonds |
| C. | S-bonds |
| D. | H-bonds |
| Answer» C. S-bonds | |
| 93. |
Diffusion of water through selectively permeable membrane is (CPMT 1993) |
| A. | Diffusion |
| B. | Imbibation |
| C. | Osmosis |
| D. | Translocation |
| Answer» C. Osmosis | |
| 94. |
A higher plant cell covered with cutin and suberin is placed in water, after 15 minutes, the cell (BHU 1993) |
| A. | Will be killed |
| B. | Size will increase |
| C. | Size will remain unchanged |
| D. | Size will decrease |
| Answer» D. Size will decrease | |
| 95. |
Plant cell kept in hypertonic solution will get (MPPMT 1994) |
| A. | Lysed |
| B. | Turgid |
| C. | Deplasmolysed |
| D. | Plasmoysed |
| Answer» B. Turgid | |
| 96. |
The movement of free atoms from higher concentration to lower concentration is called. (RPMT 1995) |
| A. | Osmosi |
| B. | Diffusion |
| C. | Endosmosis |
| D. | Exosmosis |
| Answer» A. Osmosi | |
| 97. |
Plasmolysis is due to (CPMT 1995) |
| A. | Exosmosi |
| B. | Endosmosis |
| C. | Osmosis |
| D. | Adsorption |
| Answer» C. Osmosis | |
| 98. |
Cotton fibres dipped in water absorb water through (RPMT 1996) |
| A. | Endosmosi |
| B. | Exosmosis |
| C. | Capillarity |
| D. | Imbibition |
| Answer» B. Exosmosis | |
| 99. |
With rise in turgidity, wall pressure will (CBSE 1997) |
| A. | Decrease |
| B. | Increase |
| C. | Fluctuate |
| D. | Remain unchanged |
| Answer» A. Decrease | |
| 100. |
Root pressur is due to (MPPMT 1993, Har. PMT 2003, Orissa 2011) |
| A. | Active absorption |
| B. | Passive absorption |
| C. | Increased transpiration |
| D. | Increased photosynthesis |
| Answer» D. Increased photosynthesis | |
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