1. Natural Sciences Grade 7
Term 1: Life and Living
Biodiversity
(PPT 6)

2. Diversity of Plants: Dicotyledons and Monocotyledons (Part 2)
Topic 2 Biodiversity
Diversity of Plants:
Dicotyledons and Monocotyledons
(Part 2)
Natural Sciences – Grade 7

3. Classification of Angiosperms
Angiosperms are divided into two groups:
Monocotyledons: plants with only 1 seed lobe
Dicotyledons: plants with 2 seed lobes
Mono = one; cotyl = seed lobe
Di = two; cotyl = seed lobe
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4. Examples of Monocotyledons
wheat maize sugar cane grass
Natural Sciences - Grade 7 4

5. Characteristics of Monocotyledons
Seed lobes = cyledons
Monocotyledons have a adventitious or fibrous root system.
Natural Sciences - Grade 7 5

6. Examples of Dicotyledons
beans roses geraniums petunias
Natural Sciences - Grade 7 6

7. Characteristics of Dicotyledons
Dicotyledons have a taproot system
Tap root = main root
Lateral roots = smaller roots
Natural Sciences - Grade 7 7

8. Natural Sciences - Grade 7
Let’s now compare…
Dicotyledons have a taproot system
Tap root = main root
Lateral roots = smaller roots
Natural Sciences - Grade 7 8

9. Summary: Diversity of Plants
Plants with seeds
Angio-sperms
Dicotyledons
Monocotyledons
Gymno-
sperms
Plants without seeds
Ferns
Mosses
Algae
Natural Sciences - Grade 7 9