Reproduction. Asexual Reproduction. What is reproduction?. Reproduction is the process by which organisms produce more of their own kind. Think about it – Without reproduction, all life on earth would no longer exist. . Reproduction:. Reproduction. The Continuity of Life.
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Reproduction is the process by which
organisms produce more of their own kind.
life on earth would no longer exist.
The Continuity of Life
2.Binary Fission - occurs in one-celled organisms such as the ameba and paramecium. The nucleus divides by mitosis and the cytoplasm divides, forming 2 new daughter cells of equal size.
3. Budding - Occurs in Hydra and yeast. The division of cytoplasm is unequal so one of the daughter cells is larger than the other. The daughter cells can separate or remain attached.
Sponges, Corals and Jellyfish…
4. Sporulation - occurs in molds, mosses, etc
5.Regeneration - Refers to the replacement or regrowth of lost or damaged body parts
Some of these animals can also grow new organisms from the severed pieces (Segmented Worms and Sea Stars)
6.Vegetative Propagation –
Occurs only in plants (vegetative). New plants develop from the roots, stems, or leaves of the parent plant.
Tubers are underground food stores which stores food over the winter and provides a new plant with food until it can make its own.
Examples: potato, artichoke, yam, cassava, water chestnut, arrowroot
Food made by the new plant is sent to make new tubers. Thereby reproducing itself.
Runners 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)
Cuttings are small pieces of stem with some leaves attached, the new plant grows from this.
They can be placed in moist
soil or water (and sometimes
dipped in rooting
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
Artificial propagation has allowed us to adapt and improve plants for our own use.
Some of the benefits include:
(depending on conditions)
Bees – unfertilized eggs become male drones
- fertilized eggs – female workers or queens