Page 161 - Biology_F5
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Biology for Advanced Level Secondary Schools
Flower
Leaf
FOR ONLINE READING ONLY
Bean pod
Stem
Tap root (Primary root) Bean seed
Figure 3.31: Structure of a dicot plant showing root and shoot systems
Activity 3.9: Observation of cross Questions
section of the stem and morphology of 1. Summarise in a tabular form
monocot and dicot plants the morphological differences
between the two classes of the
Materials collected plants.
Monocot plant (grass or maize), dicot
plant (beans or Hibiscus) plants with 2. Describe the variation in root
their flowers intact, light microscope, system, leaf venation and flower
surgical or razor blade, and slides structure between the monocot
and dicot plants.
Procedure 3. Describe the observed stem
(a) Collect some monocot and dicot sections, indicating the vascular
plants with their flowers from the bundles.
school environment. Make sure that 4. What are the differences between
you uproot the entire plant carefully the stem sections observed in (c)?
in order to display their root system
clearly.
Safety precautions
(b) Observe the morphological structure 1. Handle with care sharp objects like
of the two classes of plants collected.
surgical or razor blade to avoid
(c) Make a thin cross section of the stem cutting your fingers or hands.
of monocot and dicot plants. Place 2. Be aware of some dangerous
them on the slides and observe one animals such as piercing insects
at a time using light microscope. and snakes when collecting
monocot and dicot plants.
Form Five Student’s Book
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