BIOLOGY
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Apr 4, 2022
(a) Alluvial (b) Podosol (c) Laterite (d) None of these Ans. c
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Apr 4, 2022
(a)Â It is useful for storage (b)Â Tubers respire slowly (c)Â Â Starch is synthesized in tubers (d)Â Translocated sucrose is...
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Apr 4, 2022
(a)Â Their opening and closing is not regulated (b)Â They allow exchange of gases (c)Â Â They always remain closed (d)Â ...
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Apr 4, 2022
(a) Adhesion                          (b) Cohesion (c)  Osmosis                            (d) Plasmolysis Ans. (a)     Walls of tracheids and vessels of xylem are made up...
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Apr 1, 2022
(a)Â Phloem is present inside the xylem (b)Â It can not tolerate the injury (c)Â Â Vascular bundles are scattered (d)Â ...
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Apr 1, 2022
(a)Â Cell wall is elastic, rigid and get stretched (b)Â Cell wall is living (c)Â Â Cell wall is the outer...
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Apr 1, 2022
(a)Â Its vascular system is not directly connected (b)Â Its cells are loosely placed (c)Â Â It has cells without chloroplast...
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Apr 1, 2022
(a) Diffusion                (b) Osmosis  (c)  Surface...
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Apr 1, 2022
(a) Mineral water                  (b) Soil water (c)  Field capacity                   (d) Gravitational capacity Ans. (c)  In field capacity, the amount of...
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Apr 1, 2022
(a) Clay soil                            (b) Lome soil (c)  Silt soil                              (d) Sandy soil Ans.   (d) Removal of large molecule from...
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Apr 1, 2022
(a)Â To increase water uptake (b)Â Because it helps in rooting of cuttings (c)Â Â To reduce water loss (d)Â Because...
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Apr 1, 2022
(a) Vessels                              (b) Sieve tubes (c)  Equal in both                   (d) Vessels have no lumen Ans. b
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Apr 1, 2022
(a)   Mycoplasma                     (b) Slime body (c)  Golgi body                        (d) None of these Ans. b
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Apr 1, 2022
Cytoplasm of sieve tube (b)Â Vacuole of sieve tube (c)Â Â Cytoplasm and vacuole for a system (d)Â Â Â Â Â Â Â Â Â None of these...
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Apr 1, 2022
(a) Vessels                              (b) Tracheids (c)  Seive tubes                       (d) Fibres Ans. (d)     Fibres are sclerenchymatous. They have thick wall and provide...
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Apr 1, 2022
(a) O bonds                            (b) H bonds (c)  OH bonds                          (d) S bonds Ans. (b)     Salting of pickles and addition of...
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Apr 1, 2022
(a) Xylem and pith                (b) Xylem and phloem (c)  Phloem to epidermis       (d) Phloem to pith Ans. b
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Apr 1, 2022
(a)  More than phloem             (b)  Lesser than phloem (c)  Equal in both                      (d)  None of these Answer: (b)           In phloem,...
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Apr 1, 2022
(a)Â Stomatal movements (b)Â Both water and food transport (c)Â Â Water transport (d)Â Food transport Ans. (a)Â Â Â Â Â Dry gum or...
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Apr 1, 2022
(a)  Xylem vessels                     (b)  Xylem tracheids (c)  Sieve tubes                          (d)  All the above Answer: C
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Apr 1, 2022
(a) All dead cells                    (b) Intercellular spaces (c)  Cell wall spaces                (d) All together Ans. (b)     Meaning of diffusion is...
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Apr 1, 2022
(a)Â Lenticels, wounds and breaks around branch roots (b)Â Roots and root hairs (c)Â Â Root cap (d)Â (a) and (c)...
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Apr 1, 2022
(a) Hadrom                            (b) Leptom (c)  Bast                                   (d) All the above Ans. (b)     Because the concentration of cytoplasm of pollen grains...
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Apr 1, 2022
(a)Â Such plants are acquired much of height (b)Â They have poorly developed or entirely absent root hairs (c)Â Â Their...
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Apr 1, 2022
(a) Terminal portion of roots       (b) Zone of cell elongation (c)  Zone of cell formation      (d) Zone of cell differentiation...
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Apr 1, 2022
(a) Hydrophobic                    (b) Permeable (c)  Semipermeable               (d) Impermeable Ans. d
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Apr 1, 2022
(a) Black cotton soil               (b) Sandy soil (c)  Red soil                             (d) Ioamy soil Ans.  (b)         A variety of mineral elements...
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Apr 1, 2022
(a)Â Â Suction of water and minerals due to transpiration pull (b)Â Â Cyclosis in cell cytoplasm (c)Â Â Sugar transport in...
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Apr 1, 2022
(a)  High temperature              (b)  ATP (c)  Alkaline pH                          (d)  Salts Answer: (b)           Energy is usually provided by ATP...
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Apr 1, 2022
(a)  Wood parenchyma            (b)  Tracheids (c)  Trachea                                (d)  Wood fibre Answer: (a)      Wood (xylem) parenchyma are the living parenchymatous cells....
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Apr 1, 2022
(a)  Sieve tube                            (b)  Companion cells (c)  Bast parenchyma               (d)  All the above Answer:   d)             In phloem, sieve...
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Apr 1, 2022
(a)  Xylem                                    (b)  Phloem (c)  Parenchyma                        (d)  None of these Answer: (b)      On removing the ring of bark, phloem...
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Apr 1, 2022
Exchange of substances between individual cells and their environments takes place by (a)  Osmosis                                (b)  Diffusion (c)  Active transport                 ...
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Apr 1, 2022
The conducting tissues of the plants are (a)  Xylem                                    (b)  Phloem (c)  Xylem and phloem both  (d)  Sclerenchyma Answer: (c)...
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Apr 1, 2022
(a)  Aerial                                     (b)  Sub-aerial (c)  Underground                      (d)  All the above  Answer: (d) Metabolism is of 2 types : (a)...
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Mar 30, 2022
(a) Golgibody                         (b) Nuclear wall (c)  Mitochondria                   (d) cell wall Ans. b
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Mar 29, 2022
(a) Dictyosome                       (b) Ribosome (c)  Cisternae                          (d) Microsome Ans. a
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Mar 29, 2022
(a) Calyptrogen                     (b) Root tip (c)  Root cap                           (d) None of these Ans. c
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Mar 29, 2022
(a) PEP carboxylase              (b) Peptidyl transferase (c)  Thymine ligase                 (d) Glycosyl transferase Ans. d
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Mar 29, 2022
(a) Fermentation                   (b) Phosphorylation (c)  Glycosidation                    (d) Translocation Ans. c