1. Chapter 24 Reproduction in Seed Plants
Unit 7--Plants
Chapter 24
Reproduction in Seed Plants

2. p. 536

3. Flower Parts (non-essential)
Sepals (outermost, leaf-like) for protecting inner parts
Calyx = all sepals together
Petals (colorful, with nectar) to attract pollinators which see different patterns in ultraviolet light
Corolla = all petals together

4. What we see…
NECTER GUIDES
What they see:

5. What we see…
What they see:

6. What we see…
What they see:

7. Flower Parts (essential)
Stamens (male reproductive organs)
filaments = slender stalk supporting…
anther = produce pollen (containing sperm)
Pistils (female reproductive organs)
stigma = sticky top to catch pollen
style = slender stalk supporting…
ovary = base contains ovules -> eggs & later houses seeds

9. Fruit = ripened ovary & associated parts

10. Flower to Fruit After Pollination… Petals & stamens dry and fall off
Within ovary, seeds
develop in ovules…
Ovary becomes “core”
of the apple
Receptacle swells
around ovary…
Receptacle becomes
fleshy part of fruit
Calyx forms “crusty”
bottom of apple
Sepals dry, but
don’t fall off…

11. ovary cross section showing ovules

12. Fruit = for seed dispersal

13. Seeds Seed coat = to protect embryo (softens when wet)
Nutrients = endosperm (monocots) & fleshy cotyledons (dicots)
Embryo plant (attached to cotyledon)
radicle = embryonic root
hypocotyl = embryonic stem
epicotyl = embryonic shoot (or bud)
plumule = embryonic leaves

14. (leaves)
Hypocotyl
(stem)
Epicotyl
(shoot)