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REPRODUCATION

REPRODUCATION. Cell division. DIVISION . Organisms reproduce themselves by many various methods Some of these methods include: Asexual Binary fission Budding Sporulation Vegetative propagation Fragmentation and Regeneration Mitosis Sexual Meiosis. BINARY FISSION.

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REPRODUCATION

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  1. REPRODUCATION Cell division

  2. DIVISION • Organisms reproduce themselves by many various methods • Some of these methods include: • Asexual • Binary fission • Budding • Sporulation • Vegetative propagation • Fragmentation and Regeneration • Mitosis • Sexual • Meiosis

  3. BINARY FISSION • Asexual reproduction • Prokaryotic cells • Some protozoa • Some organelles in Eukaryotic cells

  4. BUDDING • Involves new individuals splitting off from existing ones • In this example, new individuals grow out from the body of a parent • The offspring may either detach from the parent , or remain joined, eventually forming a colony • Example – stony coral

  5. SPORULATION • This is the process by which an organism produces reproductive cells (spores) by mitosis • The organism stores these cells in sporangia, which burst open to release spores that are capable of producing adult organisms (e.g., bread mould, Penicillium). • Sporulation can also be a sexual type of reproduction (e.g., gametophytes).

  6. VEGETATIVE PROPAGATION • This is the process by which a new organism is created from the roots, stems, or leaves of plants • For example: • rhizoids in moulds, • willow branches can develop roots and grow into a new tree, • runners in strawberry plants can sprout roots and develop into a new plant

  7. FRAGMENTATION • Fragmentation is another type of asexual reproduction • Involves the breaking of the body into several pieces, some which will develop into complete adults

  8. REGENERATION • To be able to reproduce by fragmentation, it must be followed by regeneration – the regrowth of lost body parts • If an organism loses an appendage, and then re-grows it, they have not reproduced – since a new organism is not created • Some sea stars Linckia can develop new organisms from a single arm, so one single animal can produce five new offspring asexually

  9. END OF LESSON • Project set-up

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