PPT ON ASEXUAL REPRODUCTION. MADE BY SARA YADAV. PLS LIKE IF IT HELPS YOU AND FOLLOW ME FOR MORE SUCH PPTs

1. ASEXUAL REPRODUCTION IN
MULTICELLULAR ORGANISMS
~By Sara Yadav , 8A

2. ASEXUAL REPRODUCTION
 Asexual reproduction is a process in which a new organism is produced from a single parent
without any involvement of gametes or sex cells . Many unicellular and multicellular organisms
reproduce asexually.
 In this process , parent organisms either split or a part of the parent organism separates to form
a new organism.
 In this type of reproduction, certain cells of the parent undergo mitotic cell division (is a process
of nuclear division eukaryotic cells that occurs when a parent cell divides to produce two identical
daughter cells) so that two or more organisms are formed

3. Types of Asexual Reproduction in
multicellular organisms
1. Fission
2. Vegetative Propagation
3. Budding
4. Spore Formation
5. Regeneration
6. Fragmentation

4. 1. FISSION
 In Fission , unicellular organisms split to form new organisms. It is a process of reproduction in
organisms such as protozoa and many bacteria.
 There are two types of Fission – (1)Binary Fission and (2)Multiple Fission

6. 2. VEGETATIVE PROPAGATION
 This form of asexual reproduction occurs in plants only. In vegetative propagation, parts of old
plant like stems ,roots and leaves are used to grow a new plant.
 The buds which are present in dormant state in old planta are provided with suitable conditions
like moisture and warmth so that they grow and develop to form a new plant
 Plants that undergo vegetative propagation are green grass,Bryophyllum ,money plant,potato
plant,onion, banana, etc.

8. 3. BUDDING
 The word ‘bud’ means small outgrowth. In this process, a small bud grows on the body of the
parent organism and when the time comes it detaches itself to form a new organism.
 Hydra and Yeast undergo this process of reproduction.

10. 4. SPORE FORMATION
 The method of spore formation occurs in both unicellular and multicellular organisms. This is
process tasks place in plants .
 In this process, the parent plant produces hundreds of reproductive units called spores in its
spore case. When this spore case of the plant bursts , these spores travel in air and land on food
or soil. Here they germinate and produce new plants.
 Fungi like Rhizopus and Mucor reproduce through spore formation.

12. 5. FRAGMENTATION
 Fragmentation o curse in multicellular organisms, be it plants or animals. In this process the
multicellular organism breaks into two or more pieces on maturation. Each piece forms an
independent individual.
 Spirogyra, which is a plant and Sea Anemones which is an animal undergoes this type of
reproduction.

14. 6. REGENERATION
 Regeneration is an asexual method of reproduction. In this process,if the body of the parent
organism gets cut,then each cut part can regenerate and form a whole new organism from its
body parts.
 This happens because when the body of an organism that can undergo regeneration gets cut
then the cells of the cut body part divide rapidly and form a ball of cells.
 These cells then move to their proper places to form organs and body parts.
 Regeneration occurs in both plants and animals. Hydra and Planaria undergo thos process for
reproduction.

16. DIFFERENCE BETWEEN REGENERATION
AND FRAGMENTATION
REGENERATION
 Regeneration occurs when an organism
only regrows a lost limb or any other
body part.
 No new organism is formed.
 All organisms exhibit the ability to
regenerate to some degree
 Eg) Lizards can regenerate their tail
FRAGMENTATION
1. Organisms that are fragmented result in each
fragment growing into an individual
organism.
2. A new individual emerges from each
fragment.
3. Only a few organisms can fragment and
form new individuals.
4. Eg) Flatworms and Sponges