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What is asexual reproduction?
Asexual reproduction is the production of an offspring by a single parent without the development and union of gametes.
It simply involves mitotic cell divisions and does not include meiosis. Asexual reproduction produces offspring that are not only identical to their parents but also precise duplicates of them.
Asexual reproduction occurs by the formation of a spore. In fungi and bacteria, this is the most prevalent way to reproduce asexually.
If a wet slice of bread is left out in a cool, moist and dark place, it will develop a light hairy growth on its surface. This hairy growth is known as bread mould (a type of fungus). The fungus (Rhizopus) is blown around by the wind and will ultimately reach the bread's surface. Once the spore has found the surface of the bread, it will begin to consume the nutrients and moisture in order to grow.
 
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Growth of mould on bread
Fungi, such as bread mould, reproduce asexually through the generation of spores.
What are spores?
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Different types of spore formation
  
Spores (found in the air) are little spherical bodies with a thick protective shell that shields them from the elements. The spores germinate and develop into new plants when the conditions are favourable.
Important!
A sporangium originates from the fungal hypha during spore production.
Within the sporangium, the nucleus divides multiple times, each nucleus developing into a spore with a small amount of cytoplasm. After reaching the ground or substratum, the spores become freed and grow into new hypha.
Reference:
https://www.flickr.com/photos/lynnfriedman/34296658593/in/photostream/
https://upload.wikimedia.org/wikipedia/commons/thumb/5/5f/06_05_sporangiophores%2C_sporangia%2C_conidia%2C_liberation_of_spores%2C_Mucorales%2C_Zygomycota_%28M._Piepenbring%29.png/1024px-06_05_sporangiophores%2C_sporangia%2C_conidia%2C_liberation_of_spores%2C_Mucorales%2C_Zygomycota_%28M._Piepenbring%29.png