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DP Level 1 - Life Science
Class Exercise 2
Melody Leung
Vascular Bundle
Stem
Leaf 1/5 Upper / Lower epidermis
2/3 Mesophyll; 4 Air cavity
6 Stomata; 7 Trichome (fine hair)
8 Major vein - 9 xylem; 10 phloem
11 supporting tissue
6 cm split
5 h
Chrysanthemum – total split
Put one of the stem into
BLUE solution and
another into water for 5 h
Chrysanthemum – half split
6 cm split
6 cm joint 5 h
Put one of the stem into
BLUE solution and
another into water for 5 h
Tasks
• Describe your observations?
– Area of staining
– Even? Punctate?
– Any others?
• With your knowledge in the water transportation system in
plants, construct an hypothesis that could explain the staining
patterns of the “total split” and “half split” chrysanthemum.
Base on your hypothesis, predict
(with explanation) the fate of this
chrysanthemum.
Air dry for 5 hwater
6 cm total split
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