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Forms of Asexual Reproduction
Asexual reproduction only needs _____ parent!!!!
Binary Fission
One cell becomes two. In Prokaryotic organisms, such as bacteria its how they Reproduce !!! There entire bodies are only the size of one cell. If we could reproduce this way, Mr. Sergent could simply split and make two Mr. Sergent’s. Would that not be great!!!!
Binary Fission is fast!!!!Bacteria cells undergo binary fission! In a
single night one can become billions.
http://www.youtube.com/watch?v=gEwzDydciWc&NR=1
Our bodies undergo Binary Fission as well.The Eukaryotic cells in our body ,SOMATIC
cells divide through Mitosis which is a form of “BINARY FISSION”
http://www.youtube.com/watch?v=nPG6480RQo0&feature=related
Binary Fission in Bacteria versus Binary Fission in Eukaryotic cells.http://www.youtube.com/watch?v=nPG6480R
Qo0&feature=related
1. Which divides faster, bacteria cells or our cells?
2. What are two advantages of being able to reproduce like a bacteria cell?
3. What are some disadvantages of being able to reproduce like a bacteria?
I can “learning check”
“Regeneration”Allows organisms to grow back body parts!
Some organisms like planarians that are cut into sections will grow back into two organisms.
http://www.youtube.com/watch?v=JrcDLew55tU
http://www.youtube.com/watch?v=4exOh6swPp8&feature=related
http://www.youtube.com/watch?v=vXN_5SPBPtM&NR=1
Asexual reproduction vegetative propagation
3 methods of vegetative propagtaion-tubers-bulbs-runners
TubersTubers are underground food stores which stores food over the winter and provides a new plant with food until it can make its own.
Food made by the new plant is sent to make new tubers. Thereby reproducing itself.
Examples: potato, artichoke, yam, cassava, water chestnut, arrowroot
Taro- Japanese potato
Bulbs
E.g. daffodils, lilies
RunnersRunners are side shoots which grow out from the parent plant.
Buds form at points along the runner and eventually these buds form roots and grow into new plants.
Examples: spider plant (Anthericum), strawberry (Fragaria x ananassa)
Cutting
They can be placed in moist
soil or water (and sometimes
dipped in rootingpowder).
Cuttings are small pieces of stem with some leaves attached, the new plant grows from this.
Grafting
A cut stem of one plant (with good flower or fruit growth) (the graft) is taken and firmly attached to the rootstock of another plant (which has a strong, established root system) (the stock).
Examples- roses, fruit trees
I can “Learning Check”
What are three ways that a plant can go through vegetative propagation?
What are two ways that a plant can go through artificial vegetative propagation?
Budding
When an organism reproduces by growing an identical copy on the outside of its body.
Parthenogenesis
The development of eggs that have not been fertilized.
I can “Learning Check”What are the advantages of budding?What are the advantages of parthogenesis?What organisms may undergo budding?What organisms may undergo parthogensis?
