This document discusses microorganisms and their roles as both friends and foes. It describes that microorganisms can be unicellular or multicellular, and exist in diverse environments including inside human and animal bodies. There are four main types - bacteria, fungi, algae, and protozoa. While some microorganisms are beneficial in activities like making bread, alcohol, medicines, and increasing soil fertility, others are harmful causing diseases in humans, plants and animals as well as food poisoning. Microorganisms also have roles in sewage treatment and human gut health.
Powerpoint on viruses, bacteria, protists and Fungi. Intended for the SA Grade 11 Life Sciences syllabus. Includes information on HIV, virus reproduction, malaria, TB, thrush, characteristics of microbes etc. Hope it helps!
this is the full explanation of class 8 NCERT sci micoorganism chapter of biology section if you have any queries you can leave a comment i will completely try to reply. hope you like it. & understand it clearly .there are some activities you can try which can make your concept more clear;)
Powerpoint on viruses, bacteria, protists and Fungi. Intended for the SA Grade 11 Life Sciences syllabus. Includes information on HIV, virus reproduction, malaria, TB, thrush, characteristics of microbes etc. Hope it helps!
this is the full explanation of class 8 NCERT sci micoorganism chapter of biology section if you have any queries you can leave a comment i will completely try to reply. hope you like it. & understand it clearly .there are some activities you can try which can make your concept more clear;)
The Indian economy is classified into different sectors to simplify the analysis and understanding of economic activities. For Class 10, it's essential to grasp the sectors of the Indian economy, understand their characteristics, and recognize their importance. This guide will provide detailed notes on the Sectors of the Indian Economy Class 10, using specific long-tail keywords to enhance comprehension.
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How to Create Map Views in the Odoo 17 ERPCeline George
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2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
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Operation “Blue Star” is the only event in the history of Independent India where the state went into war with its own people. Even after about 40 years it is not clear if it was culmination of states anger over people of the region, a political game of power or start of dictatorial chapter in the democratic setup.
The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
2. MICROORGANISMS
o Microorganisms are very small organisms
which cannot be seen with the unaided eye.
They can be seen only with a magnifying glass
or microscope.
3. Microorganisms may be unicellular or
multicellular.
Microorganisms may be single-celled like
bacteria, some algae and protozoa, or
multicellular, such as many algae and fungi.
Microorganisms may exist alone or in colonies.
4. WHERE DO MICROORGANISMS
LIVE..??
Microorganisms live in all types of
environment, ranging from ice cold climate to
hot springs; and deserts to marshy lands.
They are also found inside the bodies of
animals including humans.
Some microorganisms grow on other
organisms while others exist freely.
5. TYPES OF MICROORGANISMS
There are four main types of
microorganisms. They are:
Bacteria (Examples- Streptococcus,
Staphylococcus etc.);
Fungi (Examples- Penicillium, Yeast
etc.);
Algae (Examples- Nostoc, Volvox etc.);
Protozoa (Examples- Amoeba,
Paramecium etc.)
Viruses are also considered as
microorganisms.
Eg. of virus- Coronavirus, Hepatitis etc.
Penicillium
6. MICROORGANISMS AND US
Microorganisms play an important role in our lives.
Some of them are beneficial in many ways whereas
some others are harmful and cause diseases.
7. FRIENDLY MICROORGANISMS
Microorganisms are used for
various purposes. Some of
them are:
Making Curd:
The bacterium called Lactobacillus
reproduces in milk and helps to
convert milk into curd.
Making Bread:
The fungus called yeast reproduces
in flour dough and produces carbon
dioxide during respiration which
makes the dough soft.
8. Making Alcohol:
The fungus called yeast reproduces in sugar
solution and convert it into alcohol. This
process is called fermentation.
Making medicines:
Some bacteria and fungi are used to
make medicines which kills or stops the
growth of disease causing
microorganisms. Such medicines are
called antibiotics. Eg:- Streptomycin,
Penicillin, tetracyline, erythromycin etc.
9. Vaccines:
Vaccines are dead or weakened microbes introduced into
the body to produce antibodies. These antibodies protect
the body from disease causing microbes. Diseases like
Polio, cholera, typhoid, small pox, hepatitis etc. can be
prevented by taking medicines.
10. Increasing Soil
Fertility:
Some bacteria like
(Rhizobia, Nostoc) are able
to fix nitrogen from the
atmosphere to enrich soil
with nitrogen and increase
its fertility. These microbes
are commonly called
Biological nitrogen fixers.
Cleaning the
environment:
Microorganisms can be used
to degrade the harmful and
small substances and thereby
cleanup the environment.
Example-Pseudomonas putida
Pseudomonas putida
11. Microbes Help in Sewage Treatment:
Sewage treatment is a process in which the
pollutants are removed. Microbes are used to
degrade organic matter while producing water and
byproducts consistent with the type of bacteria
grown.
12. Microbes in Human Gut:
Lactobacillus is a type of bacteria found in
human intestines. Its name gives an
indication of what it produces — lactic
acid. It does this by producing an enzyme
called lactase. Lactase breaks down
lactose, a sugar found in milk, into lactic
acid. Lactobacillus can help us break
down food, absorb nutrients, and fight off
"unfriendly" organisms that might cause
diseases such as diarrhea.
13. HARMFUL MICROORGANISMS
Microorganisms are harmful in many ways. Some of their
harmful activities are:
Disease causing Microorganisms
in Humans:
a) Disease causing microorganisms enter
our body through air, water, food,
contact or insects. These
microorganisms are called pathogens.
b) Disease which can spread from an
infected person to a healthy person are
called communicable diseases. Eg-
Cholera, Tuberculosis etc.
c) Some insects can also act as carrier of
disease causing microbes.
Example- House fly, Female anopheles
mosquito (Malaria).
14. Disease causing Microorganisms in plants:
Several microorganisms cause diseases in plants like wheat,
rice, potato, sugarcane, orange, apple and others. The
diseases reduces the yield of crop.
Plant Diseases Microorganism Mode of Transmission
Citrus Canker Bacteria Air
Rust of Wheat Fungi Air, Seeds
Yellow vein Virus Insect
Mosaic of bhindi
(Okra)
Table showing some plant disease causing microorganisms.
15. Disease causing Microorganisms in Animals:
Several microorganisms not only cause diseases in humans and
plants, but also in other animals.
Food and mouth disease of cattle is caused by a virus.
Anthrax is a dangerous human and cattle disease caused by a
bacterium.
16. FOOD POISONING:
It can be due to the consumption of food spoilt by some
microorganisms.
Microorganisms that grow on our food sometimes produce
toxic substances, these make the food poisonous causing
serious illness and even death.
So it is very important that we preserve food to prevent it from
being spoilt.
17. BIOLOGICAL WARFARE:
Biological weapons include
living organisms and
biologically produced toxins to
injure people, animals and
destroy crops. These include
harmful microbes such as
Bacteria, Viruses and spores.
Toxins are produced by these
microbes. This causes mass
destruction of populations.
18. BIODETERIORATION OF MONUMENTS:
Cultural heritage monuments may be discolored
and degraded by growth and activity of
living organisms. Microorganisms form biofilms
on surfaces of stone, with resulting aesthetic and
structural damage.
19. TOOTH DECAY
Tooth decay, also known as dental caries or
cavities, is a breakdown of teeth due to acids
made by bacteria.
Streptococcus is the main cause of dental
decay.
20. ALGAL BLOOM
Increase growth of
algae in water
systems leads to
decrease in oxygen
in water bodies
and this can be
threat to aquatic
life.
21. CONCLUSION
Microorganisms are very small organisms which
cannot be seen with the unaided eye. They can be
seen only with a magnifying glass or microscope.
Some of them are beneficial in many ways whereas
some others are harmful and also causes diseases.
In 1929, Alexander Fleming was working on a culture of disease-causing bacteria. Suddenly he found the spores of a little green mould in one of his culture plates. He observed that the presence of mould prevented the growth of bacteria. In fact, it also killed many of these bacteria. From this the mould penicillin was prepared.