When a moist slice of bread was kept aside for a few days then some organism grew on it to form a white cottony mass which later turned black. When this slice of bread was observed through a magnifying glass, then fine thread-like projections and thin stems having bulb-like structures at the top were seen.(a)What is the common name and scientific name of the organism which grew on the moist slice of bread?
(b)How did this organism grow on the moist slice of bread automatically?
(c)What are the fine, thread-like projections on the surface of slice of bread known as?
(d)What name is given to the knob-like structures and what do they contain?
(e)What is the name of this method of reproduction?
(f)Name one unicellular organism which reproduces by this method.
(g)Name two non-flowering plants which reproduces by this method.
(a) The organism growing on the moist slice of bread is commonly known as bread mould and its scientific name is Rhizopus.
(b) Bread mould grows on the moist slice of bread instantly because the spores of this fungi are present in the air and under favourable condition (presence of nutrients and moisture), it reproduces asexually.
(c) The fine, thread-like projections on the surface of a slice of bread are known as Hyphae.
(d) The knob-like structures are known as sporangium and they contain spores.
(e) This method of reproduction where new organisms grow from the spores is known as Sporulation or Spore formation.
(f) Bacteria are the unicellular organisms that reproduce by spore formation method.
(g) Fern and mosses are the non-flowering plants that reproduce by spore formation method.
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