Spore Formation
Spore Formation: Overview
This topic explains spores. These are asexual reproductive structures found in simple multicellular organisms in a specialised sac called sporangia. These are tiny structures which germinate in favourable conditions and give rise to new individuals.
Important Questions on Spore Formation
Name one organism which reproduces by spore formation which is commonly known as bread mould. (Rhizopus/ Spirogyra)
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.
Name two non-flowering plants which reproduce by spore-formation.
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.
Name the common name of one unicellular organism which reproduces by spore formation method and can be found on stale bread.(Bread mould/ Green mould/ Black mould)
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.
What is the name of this method of asexual reproduction?
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.
What name is given to the knob-like structures and what do they contain?
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.
What are the fine, thread-like projections on the surface of a slice of bread known as? (Sporangia/Hyphae/ Conidia)
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.
How did this organism grow on the moist slice of bread automatically?
Name the method by which bread mould (Rhizopus) reproduces. Is this method sexual or asexual?
Spore formation is the most common asexual method of reproduction in
In Rhizopus fungus, the fine thread-like structures spread on the whole surface of a slice of bread are called
One of the following reproduces by forming spores. This is
The factors responsible for the rapid spreading of bread mould on slices of bread are
(i) presence of a large number of spores in air.
(ii) presence of a large number of thread-like branched hyphae.
(iii) presence of moisture and nutrients.
(iv) formation of round shaped sporangia.
One of the following does not reproduce by spore formation method. This is
Why does bread mould grow profusely on a moist slice of bread but not on a dry slice of bread?
Spores produced by the bread mould plant are actually its seeds.
