Shilpa

(a)  Phloem is present inside the xylem (b)  It can not tolerate the injury (c)   Vascular bundles are scattered (d)  Plants are very delicate Ans. (c)           In monocot like sugarcane, maize, etc. due to absence of cambium secondary growth is …

(a)  Cell wall is elastic, rigid and get stretched (b)  Cell wall is living (c)   Cell wall is the outer most layer of plant cell (d)  Cell wall is permeable Ans.  (a)           Cell wall is the outermost, rigid, protective, non …

(a)  Its vascular system is not directly connected (b)  Its cells are loosely placed (c)   It has cells without chloroplast (d)  It has no root hair Ans. d (11)

(a) Diffusion                               (b)  Osmosis  (c)   Surface tension                 (d)  Active transport Ans.   (c) (15)

(a)  Mineral water                   (b)  Soil water (c)   Field capacity                    (d)  Gravitational capacity Ans.  (c)   In field capacity, the amount of water present in soil against gravitational force is called as field capacity. (11)

(a)  Clay soil                             (b)  Lome soil (c)   Silt soil                               (d)  Sandy soil Ans.     (d)  Removal of large molecule from cell is also known as exocytosis. (48)

(a)  To increase water uptake (b)  Because it helps in rooting of cuttings (c)   To reduce water loss (d)  Because the cuttings need less food Ans.(c)           Because loss of water takes place through leaves by transpiration. (9)

(a)  Vessels                               (b)  Sieve tubes (c)   Equal in both                    (d)  Vessels have no lumen Ans. b (32)

(a)      Mycoplasma                      (b)  Slime body (c)   Golgi body                         (d)  None of these Ans. b (25)

Cytoplasm of sieve tube (b)  Vacuole of sieve tube (c)   Cytoplasm and vacuole for a system (d)          None of these Ans.          (c)   In mycotoplasm, cytoplasm of sieve tubes along with vacuolar system in which water, food …

(a)  Vessels                               (b)  Tracheids (c)   Seive tubes                        (d)  Fibres Ans.  (d)      Fibres are sclerenchymatous. They have thick wall and provide mechanical support. (56)

(a)  O bonds                             (b)  H bonds (c)   OH bonds                           (d)  S bonds Ans. (b)      Salting of pickles and addition of sugar to jams prevent their decay by microbes, or the later get killed due to plasmolysis or due to high …

(a)  Xylem and pith                 (b)  Xylem and phloem (c)   Phloem to epidermis        (d)  Phloem to pith Ans. b (42)

(a)   More than phloem              (b)   Lesser than phloem (c)   Equal in both                       (d)   None of these Answer: (b)            In phloem, concentration of carbohydrates is more. (16)

(a)  Stomatal movements (b)  Both water and food transport (c)   Water transport (d)  Food transport Ans. (a)      Dry gum or pieces of agar-agar are placed in water, they swell and their volume increases. (11)

(a)   Xylem vessels                      (b)   Xylem tracheids (c)   Sieve tubes                           (d)   All the above Answer: C (11)

(a)  All dead cells                     (b)  Intercellular spaces (c)   Cell wall spaces                 (d)  All together Ans. (b)      Meaning of diffusion is to flow out or to diffuse or to disperse or to extend in all directions. (24)

(a)  Lenticels, wounds and breaks around branch roots (b)  Roots and root hairs (c)   Root cap (d)  (a) and (c) both Ans.  (b)      Because the concentration of cytoplasm of pollen grains is high in comparison to dilute sugar solution or …

(a)  Hadrom                             (b)  Leptom (c)   Bast                                    (d)  All the above Ans. (b)      Because the concentration of cytoplasm of pollen grains is high in comparison to dilute sugar solution or water. (51)

(a)  Such plants are acquired much of height (b)  They have poorly developed or entirely absent root hairs (c)   Their roots are much branched (d)  All the above Ans. (b)      In orchids, aerial roots are found which have velamen tissue, …

(a)  Terminal portion of roots        (b) Zone of cell elongation (c)   Zone of cell formation       (d)  Zone of cell differentiation Ans.  (d)          Proteins are the strongest imbibants of water, starch less strong, cellulose being the weakest. That is why proteinaceous …

(a)  Hydrophobic                     (b)  Permeable (c)   Semipermeable                (d)  Impermeable Ans.  d (8)

(a)  Black cotton soil                (b)  Sandy soil (c)   Red soil                              (d)  Ioamy soil Ans.   (b)          A variety of mineral elements is present in the soil but all of them are not essential for plant growth. Plants take in small quantity …

  (a)   Suction of water and minerals due to transpiration pull (b)   Cyclosis in cell cytoplasm (c)   Sugar transport in phloem (d)   Distribution of hormones from one part to other (13)

  (a)   High temperature               (b)   ATP (c)   Alkaline pH                           (d)   Salts Answer: (b)            Energy is usually provided by ATP or by concentration gradient of ions. (12)

(a)   Wood parenchyma             (b)   Tracheids (c)   Trachea                                 (d)   Wood fibre Answer: (a)       Wood (xylem) parenchyma are the living parenchymatous cells. As found associated with xylem they are known as wood parenchyma. (16)

(a)   Sieve tube                             (b)   Companion cells (c)   Bast parenchyma                (d)   All the above Answer:      d)              In phloem, sieve tube elements have thin cellulosic walls, companion cells and phloem parenchyma are simple thin walled parenchymatous cells except phloem fibres …

  (a)   Xylem                                     (b)   Phloem (c)   Parenchyma                         (d)   None of these Answer: (b)       On removing the ring of bark, phloem and cambium are removed from stem. (7)

Exchange of substances between individual cells and their environments takes place by (a)   Osmosis                                 (b)   Diffusion (c)   Active transport                  (d)   All of these Answer d (18)

The conducting tissues of the plants are (a)   Xylem                                     (b)   Phloem (c)   Xylem and phloem both   (d)   Sclerenchyma Answer: (c) Conduction of water and food material takes place respectively by xylem and phloem (11)

(a)   Aerial                                      (b)   Sub-aerial (c)   Underground                       (d)   All the above   Answer:  (d) Metabolism is of 2 types : (a) Anabolism (i.e., Constructive or synthetic processes) (b) Catabolism (i.e., Catabolic processes or destructive processes). Metabolism takes place in all part …