1. Asexual vs. Sexual Reproduction
Sexual Reproduction in Plants

2. Reminder Sexual Reproduction Asexual Reproduction involves 2 parents
involves only 1 parent
offspring genetically identical to parent
involves regular body cells
its quick
Sexual Reproduction
involves 2 parents
offspring genetic mix of both parents
involves specialized sex cells
its slow

3. Sexual Reproduction in Plants
pollen (male) + ovule (female) → single-celled zygote → multi-celled embryo (contained in a seed) → new individual

4. Sepals and Petals
Sterile (do not have the capacity to produce gametes) leaf-like structures.
May be brightly colored.
Function
Protect other flower parts.
Attract pollinators.

5. Stamens Male reproductive flower structure.
Anther - pollen producing sac.
Filament - stalk.
Function
Produce pollen (like plant sperm).

6. Pistil Female reproductive flower structure. Function
Produce ovules.
Stigma – receives the pollen.
Style – stalk.
Ovary – contains the ovules.

7. Ovule
An immature seed before fertilization.

8. Flower Variations Perfect Flowers - have stamens and carpels.
Imperfect Flowers - have stamens or carpels.
Staminate Flower
Carpellate Flower

9. Pollen Vectors
Bees
Butterflies
Birds
Bats
Flies
Moths
Beetles
Wind

10. Sexual Reproduction Summary
Male Gamete
Female Gamete
Type of Union
Result of Union
Final Result
Plants
pollen
ovule (egg)
pollination
single cell zygote
multi-cell embryo
(in seed)
Animals
sperm
egg
fertilization

11. Which is Better? Asexual Reproduction advantages disadvantages
does not require special cells or a lot of energy
can produce offspring quickly
in a stable environment creates large, thriving population
disadvantages
limited ability to adapt
face massive die-off if environment changes
Sexual Reproduction
advantages
lots of variation within a species
able to live in a variety of environmental settings
able to adapt to changes in the environment
disadvantages
needs time & energy
produce small populations