1 / 15

Asexual reproduction

Asexual reproduction involves a single parent organism producing offspring genetically identical to itself. In prokaryotic organisms, this occurs through processes such as binary fission, while eukaryotic organisms utilize mitosis for growth and cell repair. A variety of asexual reproduction methods exist, including budding (as seen in hydra), spore formation (mold and fungi), and regeneration (in sea stars and lizards). Additionally, both natural and artificial vegetative reproduction techniques, such as cuttings and grafting, allow for rapid and efficient plant propagation, producing clones of the parent plant.

roddy
Télécharger la présentation

Asexual reproduction

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Asexual reproduction Topic Two

  2. Asexual reproduction- one parent creates a new organism, or offspring

  3. Offspringof PROKARYOTIC organisms will have hereditary material that is identicalto the parent • EUKARYOTIC organisms use mitosis (sexual reproduction) to producenewfunctioning cells • Eukaryotic organisms need this process for the growth and repair of cells

  4. Binary Fissionis equal division • Simplest form of asexual reproduction • Occurs when the organism does not have a nucleus • Genetic material is copied and the organism divides • Examples…bacteria, protozoa, algae

  5. Paramecium

  6. Budding • Parent divides into a new organism • Grown organism eventually breaks away • Examples…sponges, hydra, worms (some)

  7. Hydra

  8. Spore Formation • Spores (haploidcells) develop • Spores grow into a new organism • Examples… mold, fungi (mushrooms), algae

  9. Regeneration • Regrowth of a lost body part • Examples… sea stars, lizards, some mammals (even humans?)

  10. Natural Vegetative Reproduction • Bulbs: short underground stem surrounded by thick, fleshy leaves which stores food • Examples… tulips, onions, lilies

  11. 2. Tubers: enlarged part of an underground stem • Examples… Potato, rutabaga, yam

  12. 3. Runners: stem that grows sideways above the ground • Examples… strawberries, spider plants

  13. Artificial Vegetative Reproduction • Cutting: uses the stem, leaf or root of a plant to produce a new individual • Stem cutting- a branch is placed in water until roots develop. Once roots develop, the cutting becomes an independent plant Examples… roses, ivy, grapevines

  14. Grafting: stem or bud is removed from one plant and joined permanently to the stem of a closely related plant, after time the two plants grow together • Examples… lilacs, peach and avocado trees, seedless fruit

  15. Advantages • Produces plants exactly like the parent • Development of a plant is much faster than when grown from a seed • Can obtain higher yields of fruit or nuts • Can produce seedless fruits

More Related