Page 92 - General and Inorganic Chemistry for Advanced Secondary Schools Students Book Form Five and Six
P. 92

Biology for Secondary Schools



              Division Bryophyta                      trees. The sexual reproduction process
              Members of the  division Bryophyta  in bryophytes depends on availability
              are called  bryophytes, which are the  of water, that is why their distribution
              most primitive plants. They are found  is restricted to shady and moist places.
              in wet and shaded environments, such  Examples of bryophytes are mosses
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              as on forest floors, rock surfaces, bare  and hornworts, as shown  in Figure
              soil, cracks of paved surfaces, bricks,  5.17.
              as well as on trunks, and branches of



























                                        (a)                                                          (b)
                        Figure 5.17:  Examples of bryophytes (a) mosses (b) hornworts

              Activity 5.7:  Investigating the        Question
              structure of bryophytes                 What is the significance of bryophytes
                                                      in ecosystems?
              Materials:  Mosses, hand lens,
              notebook, and pen or pencil             General characteristics of bryophytes
                                                      (a)  Bryophytes live in moist, damp,
              Procedure                                   and shaded areas.
              1.  Collect moss plants from the        (b)  They  do  not  produce  flowers,
                   school or home environment.            fruits or seeds.
              2.  Use a hand lens to observe the
                   structure of a moss plant.         (c)  They have root-like  structures
              3.  Describe the observed external          called rhizoids.
                   features of the moss plant.        (d)  They reproduce sexually and
                                                          asexually by spores.



                86                                                     Student’s Book Form  One                   Student’s Book Form One




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