LICHENS
- What are Lichens? Lichens are
composed of two plants, a fungus and an alga, living in close association.
The fungus provides the alga with moisture and protection from exposure.
- Which is the natural dye obtained from
Lichen? Litmus, the dye used in
chemical tests for acidity.
- How many types of Lichens are
classified? Some 15,000 species
are classified.
- Which scientist established that bacteria are
plants? Karl Wilhem Von Nigole in
1857.
- What is the size of the
bacterium? 10-(power)4 cm.
- Which is the bacterium in the soil that can absorb
Nitrogen? Azotobactor.
- Who established that there are bacteria which are beneficial to
man? Louis Pasteur.
- Which bacterium causes Tetanus?
Clostridium tetani.
- How are bacteria classified?
They are classified into the following types of cell: the ovoid or
spheroid called coccus; the rod or cylindrical bacillus; the curved vibro
and coil shaped spirochaetes.
- How is it that bacteria cannot survive in a highly salted
pickle? Because they become
plasmolysed and consequently get killed.
- Which bacterium is responsible to make milk into
curd? The Lactobacillus.
- Which bacterium causes Typhoid?
Salmonella typhosa.
- What kind of bacterium spreads
Cholera? Vibrio.
- Name the bacterium which causes Gonnorrhea:
Nisseria Gonnorrhea.
- Which bacterium produces
Syphilis? Triponema Pallidum.
- Who isolated the bacterium which causes
leprosy? G. R. Hanson.
- Name the leprosy-producing
bacteria: Mycro bacterium feorae.
- The substance excerted by bacteria into human
body: Toxin.
- What are Bacteriophages?
Bacteriophages are the viruses which attack and kill bacteria. It
consists of protein and nucleic acid.
- Which are the diseases that can be cured by using
Bacteriophages?
Dysentry and Typhoid.
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