What are seeds?
Lesson Objective To dissect and study the morphology and anatomy of a dicotyledonous seed.
Parts of a seed – seed coat Why do seeds have a seed coat? Why do seeds have a seed coat?
Why are seeds so different? Shape Size Colour Texture
Seed coat texture Cactus seed under a powerful microscope
What is a dicotyledonous seed?
Dicot = 2 Cotyledons
Parts of a seed – Inside the seed
Parts of a seed First leaves Epicotyle = stem
What do seeds need to GERMINATE? Oxygen - Growth Sun - Energy for PHOTOSYNTHESIS Temperature – Cold? Hot? Warm? Water - Photosynthesis and growth
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
PARTS OF A SEED - INSIDE