1. Reproduction In Plants

2. Reproduction is the Spice of Life
What are the two types of reproduction?
Asexual and Sexual
What are the advantages of Asexual repro?
Quick and Easy typically done by simple organism with small circular DNA
One is enough do not require a partner
What are the advantages of Sexual repro?
Variation mixing DNA means better survival rate
Mutations increased rate of positive changes in DNA
DNA
Cell Wall

3. Steps of Binary Fission
Cell Wall
Cell membrane
What type of division allows sexual reproduction to occur?
Meiosis
What type of division allows asexual reproduction to occur?
Mitosis…sort of
Binary Fission division of a simple cell through asexual reproduction
Cell grows in size; elongates cell wall
Circular DNA is replicated (organelles too)
DNA and organelles move towards opposite poles of the cell
Cytokinesis cuts cell in two
DNA

4. Spore Formation Do only bacteria cells reproduce asexually?
No! Fungi and some plants have an asexual part of their life cycle
Gametophyte and Sporophyte cycles:
Spores are released into the air by a sporophyte
Spores grows through mitosis to build hypha, mycelium, and sporangia (makes more spores)
Eventually a gametophyte forms and produces male and female gametes by meiosis
Gametes mix by fertilization and produce a zygote that grows into a sporophyte
Sporophyte will produce more spores through meiosis and cycle repeats
Hypha
Spores
Gametes
Fertilization
Sporangia
Meiosis
Zygote
Germinate
Spores Released

5. Potato-A-Go-Go Which part of the potato do we eat?
The Tuber! It is the starch filled energy bank for the potato plant
How do potatoes reproduce?
With the Tuber!
Parent plant grows from tuber; Extra energy from photosynthesis is made into starch and stored in new tubers
Parent plant dies at the end of the season; tubers stay dormant underground
New plants grow from tuber “eyes” next season; tuber also acts are source of energy before leaves form
All growth is through mitosis, so all tubers are genetically identical to each other
New Plant
“Eye”