Some Microscopic Organisms

Subject: Science

Find Your Query
Kaspersky total security

Overview

Bacteria are microscopic organisms whose single cells have neither membrane-enclosed nucleus nor other membrane-enclosed organelles like mitochondria and chloroplasts.
Some Microscopic Organisms

There are various types of animals in the earth. There are microscopic organisms which cannot be seen by our naked eyes. They can only be seen by the microscope. Bacteria, virus and fungi are the microscopic organisms.

Bacteria

Bacteria are microscopic organisms whose single cells have neither a membrane-enclosed nucleus nor other membrane-enclosed organelles like mitochondria and chloroplasts. Bacteria was discovered by 'Anton Van Leeuwenhoek'. Bacteria can survive on air, water, land, animals and plants. Bacteria are in spherical, rod-shaped, coiled, comma and thread. Some examples of bacteria are coccus, bacillus, helical and vibrio.

Bacteria have no nucleus. Bacteria can be useful and harmful too. Rhizobium helps in nitrogen fixation.

Virus

Scholarships after +2 Abroad Studies Opportunities

Virus word is derived from Latin. They are an obligatory parasite and cannot survive outside the living host. The virus has characteristics of both living and non-living beings. Virus are made of Deoxyribonucleic acid (DNA) and Ribonucleic acid (RNA).

Virus divided according to its host:

  1. Plant Viruses: The viruses that affect plants are classified under plant viruses. Example: TMV (Tobacco Mosaic Virus) etc.
  2. Animal Viruses: The viruses that affect animals are classified under animal viruses. Example: Rabies, Rhino Virus etc.
  3. Bacteriophage Virus: The viruses that affect bacteria are classified under bacteriophage. T1, T4 etc.

Fungi

Fungi have no chlorophyll. Some of the fungi are unicellular i.e. yeast and some are multicellular. Fungi can be both parasitic and saprophytic. Fungi gets its food from dead and decayed substances.

Fungi is made up of the collection of filament called hyphae. Fungi reproduce by fragmentation, budding, fission and sporulation. These are all asexual reproduction. Yeast is used to make an alcoholic beverage. The mushroom is also a fungus.

Things to remember
  • Bacteria are microscopic organisms whose single cells have neither a membrane-enclosed nucleus nor other membrane-enclosed organelles like mitochondria and chloroplasts.
  • Virus are made of Deoxyribonucleic acid (DNA) and Ribonucleic acid (RNA).
  • Fungi have no chlorophyll. Some of the fungi are unicellular i.e. yeast and some are multicellular.
  • Fungi reproduce by fragmentation, budding, fission and sporulation.
  • It includes every relationship which established among the people.
  • There can be more than one community in a society. Community smaller than society.
  • It is a network of social relationships which cannot see or touched.
  • common interests and common objectives are not necessary for society.
Videos for Some Microscopic Organisms
A Virus Invades Your Body
Bacteria
Bacteria
Bacteria: The Good, The Bad, The Kinda Gross
Fungi: Death Becomes Them - CrashCourse Biology #39
Superbugs
Viruses
Viruses
What is a fungus?
Questions and Answers

Bacteria are microscopic organisms whose single cells have neither a membrane-enclosed nucleus nor other membrane-enclosed organelles like mitochondria and chloroplasts. Bacteria was discovered by 'Anton Van Leeuwenhoek'. Bacteria can survive on air, water, land, animals and plants. Bacteria are in spherical, rod-shaped, coiled, comma and thread. Some examples of bacteria are coccus, bacillus, helical and vibrio. Bacteria have no nucleus. Bacteria can be useful and harmful too. Some bacteria cause diseases like Vibrio which causes cholera and some helps in nitrogen fixation like rhizobium.

Fungi have no chlorophyll. Some of the fungi are unicellular i.e. yeast and some are multicellular. Fungi can be both parasitic and saprophytic. Fungi gets its food from dead and decayed substances.Fungi is made up of a collection of filament called hyphae. Fungi reproduce by fragmentation, budding, fission and sporulation. These are all asexual reproduction. Yeast is used to make an alcoholic beverage. The mushroom is also a fungus.

Virus is the smallest micro organism. As they survive and reproduce only inside other organisms, viruses are called obligatory parasites.
The two characteristics of virus that make it living are:
  1. They have genetic material, DNA and RNA
  2. They reproduce in large numbers while inside the other organisms.
  1. They do not have a cellular structure.
  2. They do not synthesize proteins.

Based on the nature of host cells, there are three types of virus- Animal virus (attacks animals), Plant virus (attacks plants) and Bacteriophages (attacks bacteria).

Full form of:
HIV- Human Immunodeficiency Virus
AIDS- Acquired Immunodeficiency Syndrome
DNA- Deoxyribo Nucleic Acid
RNA- Ribo Nucleic Acid

Quiz

© 2019-20 Kullabs. All Rights Reserved.