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Page 87 - CT&AI_CLasa_7_Part_1
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    Which line on the graph most likely represents     7.  Four students made the following statements
                         Pot P?                 (Pattern Recognition)         about transport in plants:
                                                                              Student A: Food is prepared in the leaves and
                                (a)  A downward sloping line
                                                                              transported to all parts of the plant through
                                (b)   A flat horizontal line                  the phloem.
                                                                              Student B: Phloem transports food only in the
                                (c)   A steadily rising line                  upward direction like xylem.

                                                                              Student C: Food is mainly transported in the
                                (d)  A zig-zag line
                                                                              form of sugars such as glucose.
                      5.  Annu performs the experiment  to  observe           Student D: Water transport in plants becomes
                         water transport in plants, but cuts the plant        faster in warm conditions  due  to  increased
                         stems in the air instead of underwater before        transpiration.
                         placing them in the tumblers.                        Which of the following is correct?
                         After 24 hours,  she notices  very little  or no                             (Abstract Thinking)
                         red colour  in the  leaves  of the  twig  placed           (a)   Only A and B are correct
                         in coloured water. What  is the most  likely
                         reason for this observation?                               (b)  Only A, C and D are correct
                                               (Algorithmic Thinking)
                                                                                    (c)  Only B and C are correct
                                (a)   The red ink is too light to be seen.
                                                                                    (d)   All are correct
                                (b)   Air bubbles entered the stem and     8.  A student makes the following statements:
                                   blocked water movement.
                                                                              1.  Oxygen is taken in during photosynthesis.
                                (c)   Water  does not  move through           2.  Xylem transports food only upward.
                                   plant stems.
                                                                              3.  Stomata help in gas exchange.
                                (d)   The plant twig  does not  absorb        4.   Germinating seeds release carbon dioxide.
                                   coloured water.
                                                                              Which of the following is correct?
                      6.  A  student  says,  “Oxygen enters  the  leaf                                (Abstract Thinking)
                         through stomata during photosynthesis and                  (a)   Only 1 and 3 are correct
                         carbon dioxide  is released.”  What  is the
                         mistake?                 (Abstract Thinking)               (b)  Only 1 and 2 are correct

                               (a)  Stomata   do   not   allow   gas                (c)  Only 3 and 4 are correct
                                   exchange.
                                                                                    (d)   All are correct
                                (b)   The  gases  are reversed; carbon
                                   dioxide  enters and oxygen is           9.   Observe the given diagram.
                                   released.                                                                     Guard
                                                                                                                  cells
                                (c)  Oxygen is not involved in plants.                                             X

                                                                                                                   H O
                                                                                                                    2
                                (d)   Photosynthesis  does not  require
                                   gases.                                                                         O 2

                                                                                           Life Processes in Plants   85

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