Fungi (singular fungus) is a group of multicellular or unicellular eukaryotic organisms that exhibits a heterotrophic mode of nutrition and includes yeasts, molds, toadstools, and mushrooms. This kingdom includes about 100,000 species and is further classified based on their structure and mode of reproduction.
Basic characteristics of Fungi
Eukaryotic (presence of well-defined nucleus and have membrane-bound organelles).
The vegetative body is
made up of long, branching filamentous structures called hyphae that help them
to absorb nutrients. Network or a group of hyphae are called mycelium
(Exception: Yeast is unicellular and do not produce hyphae)
Achlorophyllous (chlorophyll
is absent), thus they cannot make their food.
Fungi exhibit a
heterotrophic mode of nutrition, they feed themselves by the absorption of
nutrients. Fungi are either saprophytic (obtain food from the dead and decaying
matter), parasitic (depend on another living host), or symbiotic (live in a
mutually beneficial relationship with other organisms)
Non-Vascular (conducting
tissues xylem and phloem is absent).
The cell wall is
presently made up of complex polysaccharide chitin and glucans. The cell wall
prevents desiccation and protects it from predators.
The most common method of
reproduction in fungi is by producing spores. Fungi produce two main types of
asexual spores, sporangiospores, and conidia. Sexual spores produced in fungi
are ascospores, basidiospores, and Zoospores.
Fungi exhibit alternation
of generation and thus have both haploid and diploid stages during their life
cycle.
Mold is a fungus that is
multinucleated, filamentous, and composed of hyphae. These thrive in warm and
moist conditions, reproduce employing spores, and can be black, green, orange,
or purple. The spores of the mold are carried by the wind and when they land on
a suitable surface, they begin to grow. To grow mold, the following materials
are required:
1.
Bread slice.
2.
Transparent sealable bag or container.
3.
A spray bottle.
Procedure
Take a slice of bread and
with the help of a spray bottle, lightly spray the bread with a coat of mist or
place the bread in the sealable bag along-with a wet paper towel. Seal the
plastic bag and place the bread in a warm and moist condition. The mold is heterotrophic
and gets its food from the starch of the bread (breaks down starch into simple
sugars). After 3-4 days, you will observe mold growth on the bread.
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