2022

(a)      In the 17th century                  (b)  In the 18th century (c)   In the 19th century          (d)  In the early 20th...

(a)  Diffusion                            (b)  Imbibition (c)   Endosmosis                       (d)  Exosmosis (e)  All of the above Ans.(b)      In gram and wheat the volume...

(a)  Both protoplasm and cell wall act as a single layer (b)  Only protoplast acts as a single layer (c)  ...

(a) Diffusion (b) Osmosis (c) Imbibition (d) All the above Ans. (c)   Imbibition takes place by outermost layer of seed....

(a)  Cell to cell movement of water (b)  Movement of water through cortical cells (c)   Active absorption of water through...

(a)  Solutes (b)  Solutions (c)   Semipermeable membrane (d)  Solvent Ans. (c)      It is essential for operation of osmosis. In plant–water...

(a)      Willstatter and Stoll           (b)  Mayor and Anderson (c)   Benson and Calvin         ...

(a)      Melvin Calvin                            (b)  Jean Senebie (c)   Julius Robert Mayer         (d)  Pelletier Caventou Answer:  (d)  Pelletier Caventou Explanation:    (d)         ...

(a)  Chromatography              (b)  Electrophorosis (c)   Spectrophotometery        (d)  Histochemistry Answers:  (a)  Chromatography Explanation: (a) (34)

(a)  Air (b)  Derive form sea water (c)   Use CO2 which is produced during their respiration only (d)  Do not...

(a)  Ruben                                (b)  Calvin (c)   Emerson                            (d)  Arnon Answer: (c)   Emerson Explanation: (c) (20)

(a)  Tropeolum                         (b)  Impatiense balsamia (c)   Tradescantia                      (d)  All the above Ans.  (c) Peel of Tradescantia leaf is generaly used...

(a)  Endosmosis                       (b)  Exosmosis (c)   Imbibition                         (d)  Isotonic solution ans. (a)      Concentration of cytoplasm of fish’s cells is higher. (15)

(a)  Benson and associates     (b)  Rouhani and associates (c)   Hatch and associates        (d)  Arnon and associates Answer: (b)  Rouhani...

(a)  Permeable membrane (b)  Impermeable membrane (c)   Semipermeable membrane (d)  None of these Ans. (c)           Which allow all solvents but...

(a)  Hypotonic solution           (b)  Hypertonic solution (c)   Isotonic solution               (d)  None of these Ans. b (17)

(a)  Blackman                           (b)  Hill (c)   Ruben                                (d)  Kalmen Answer: (a)  Blackman Explanation: (a) Blackman propounded the law of limiting factors....

(a)  Permeable membrane (b)  Impermeable membrane (c)   Semipermeable membrane (d)  None of these Ans. (c)           Which allow all solvents but...

(a)  Pure protein (gelatin)      (b)  Fungal hyphae (c)   Meristematic cells             (d)  All of them Ans.  (d)          Adsorption is the property...

(a)  Distribution of water across the cells (b)  Turgor of the guard cells (c)   Resistance to the frost (d)  All...

(a)  Growth of the young cells is brought about by osmotic pressure and turgor pressure of these cells (b)  Certain...

(a)  Potato osmoscope             (b)  Ganong’s respiroscope (c)   Microscope                        (d)  All the above Ans.   (a)  Potato osmoscope experiment proves that osmosis...

(a)  Plant remain normal (b)  Plant show vigorous growth (c)   Plant is permanently wilted (d)  Plant undergoes temporary wilting Ans....

          (a)  Xylem is blocked (b)  Cambium is blocked (c)   Phloem is blocked (d)  Some roots...

(a)  Turgidity (b)  Field capacity (c)   Water retaining power of the soil (d)  Wilting coefficient Ans.  (d)      In wilting coefficient,...

(a)  Respiration                        (b)  Photosynthesis (c)   Absorption                        (d)  Transpiration Ans.  (d)      Rapid transpiration causes mid-day leaf water deficit (temporary wilting). If...

(a)  Due to temporary wilting (b)  Permanent wilting (c)   Both (a) and (b) (d)          None of the above Ans. a...

(a)  Hydrophilic surfaces        (b)  Hydrophobic surfaces (c)   Lipophilic surfaces           (d)  All the above Ans.  (a)           Hydrophilic surface is water loving...

(a)  Osmosis                             (b)  Root pressure (c)   Capillary                            (d)  Transpiration pull Ans. (a)      Because cell wall of rhizoids and assimilatory filament...

(a)  Osmosis                             (b)  Osmosis and imbibition (c)   Imbibition alone               (d)  Diffusion Ans.(b)      These are the processes in plants for uptake...

(a)  Absorption                        (b)  Transpiration (c)   Osmosis                             (d)  None of the above Ans. (c)      Hydration of solute molecules changes the solution concentration...

(a)  Endosmosis                       (b)  Exosmosis (c)   Plasmolysis                        (d)  Imbibition Ans. (d)      Breaking of the seed coat in germinating seeds is due to...