1. What are seeds?

3. Lesson Objective
To dissect and study the morphology and anatomy of a dicotyledonous seed.

4. Parts of a seed – seed coat
Why do seeds have a seed coat?
Why do seeds have a seed coat?

5. Why are seeds so different?
Shape Size Colour Texture

6. Seed coat texture
Cactus seed under a powerful microscope

7. What is a dicotyledonous seed?

8. Dicot = 2 Cotyledons

9. Parts of a seed – Inside the seed

15. Parts of a seed
First leaves
Epicotyle = stem

16. What do seeds need to GERMINATE?
Oxygen - Growth Sun - Energy for PHOTOSYNTHESIS Temperature – Cold? Hot? Warm? Water - Photosynthesis and growth

17. GERMINATION What is germination? First leaves Steps: Seed coat breaks
2. Radicle becomes ROOT
3. Hypocotyl and epicotyl become the STEM
4. First leaves grow = PHOTOSYNTHESIS
First leaves

18. PARTS OF A SEED - INSIDE