Microorganisms Friend And Foe Lesson Plan Biology

Microorganisms Friend And Foe Lesson Plan Biology Group Of Tutors

Microorganisms Friend And Foe Lesson Plan Class 9th SST: As you know, lesson plans are detailed descriptions of the course of instructions or “learning trajectories” for teachers. Lesson plans are developed on a daily basis by teachers to guide class learning.

Details may vary depending on the preference of the teachers, the subject being covered, and the needs of the students.

Here we present Class 8th Biological Science Lesson Plans for teachers and B.Ed/B.El.Ed students. This Microorganisms Friend And Foe Lesson Plan Class 8th Science is beneficial for all the teachers and B.Ed/D.El.Ed aspirants from several universities like JAMIA, MDU, CRSU, DU, IGNOU, IPU, etc.

You can browse this Microorganisms Friend And Foe Lesson Plan (Biological Science Lesson Plans) and can also download the PDFs from the links given below.

We have provided a mega lesson plan format, which will help you in understanding the pattern of the lesson plans and also the content, headings you need to add to your lesson plans.

Microorganisms Friend And Foe Lesson Plan

Microorganisms Friend And Foe Lesson Plan (MEGA LESSON PLAN)


P.T Name – XYZ    Class – 8th
Subject – Science  Period – 4th
Sub Subject – Biological ScienceTime duration – 40 min
Topic – Microorganisms Friend And FoeDate- 11 May, 2022
Place – ABC School, Delhi

2. Content Analysis (Microorganisms Friend And Foe)

1. Microorganisms

2. Uses of Microorganisms

3. Harmful Microorganisms

3. GENERAL OBJECTIVES (Microorganisms Friend And Foe Lesson Plan)

1. To inculcate a scientific attitude in biological sciences among students.

2. To develop technical and instrumental approach to solve problems.

3. To create interest among students in biological sciences.

4. To develop observation power among students.

5. To develop analytical and critical reasoning among students.


Cognitive Domain: To enable students to classify Microorganisms.

Affective Domain: To enable students to describe useful and harmful effects of Microorganisms.

Psychomotor Domain: To enable the students to illustrate the examples of different types of microorganisms.


1. Lecture Method

2. Demonstration Method

3. Discussion Method

4. Inductive and

5. Deductive Method


1. Skill of Explaining

2. Skill of Stimulus Variation

3. Skill of Illustration with Example


General aid

Text book, chalk, duster, pointer, black board / chalk board

Specific aid

  • Charts showing microorganisms,
  • Flash cards showing food stuffs,
  • Roller board.

8. PREVIOUS KNOWLEDGE ASSUMED (Regarding Microorganisms Friend And Foe Lesson Plan)

P.T will assume that Students have some knowledge about the cell.


P.T will ask questions-

Q.1What are living organisms?Ans.1– Those organisms which can breathe.
Q.2Tell me some examples of living organisms?Ans.2- Plants, animals, humans, microorganisms.
Q.3Define microorganisms?Ans.3– Those organisms which cannot be seen by naked eye.
Q.4Give me some examples of microorganisms?Ans.4– Bacteria, virus, fungi etc.
Q.5– Tell me some uses of bacteria?Ans.5– No Response.


Well students! Today we are going to study an interesting topic, “Microorganisms: Friend and Foe”.

11. PRESENTATION OF THE TOPIC (Microorganisms Friend And Foe)

Here is the presentation:

Subject MatterPupil Teacher’s ActivityPupil ActivitiesBlack-Board Work/ Teaching Aids


Those living organisms around us which we normally cannot see. These are called microorganisms or microbes.
P.T Will start the presentation and explain the concept of microorganismsPupil will listen carefully.

Classification of Microorganisms

Microorganisms are classified into five major groups:
1) Bacteria
2) Fungi
3) Protozoa
4) Some algae
5) Virus
P.T will tell the
Classification of Microorganisms
Students will note down the  Classification of Microorganisms

1. Bacteria

Bacteria are single celled microorganisms. They are put under plant kingdom because they have rigid definite cell wall like plant cells. Bacteria can be seen under microscope which enlarges their image from a hundred to thousand times.

Eg:  Salmonella typhi, Leuconostoc mesenteroids
2. Fungi

Fungi are non-green plants. They cannot synthesize their own food. They have to depend for their food on others. Most fungi take their food from dead organic matter. Some live on other organisms as parasites.

Eg:   Penicillium notatum Aspergillus niger
P.T will explain the different types of microorganism with examplesStudents will note down each and every point and ask queries to the teacher.


Protozoa are unicellular animals. Some are free-living, others are parasites. Several parasitic protozoans cause diseases in human beings, domestic animals and plants.

Eg: Paramecium, Plasmodium, a protozoan, causes malaria.
Students will see the charts clearly and try to understand the examples.


Algae are green substances floating on the surface of a pond, lake, river, stagnant water, moist soil, stones. They tend to grow on wet surfaces. Therefore, they can synthesize their own food. They are found in water or in very moist places.

Eg: Chlamydomonas, Cyanobacteria
Students will note down the points.


Those microorganisms which reproduce only inside the cells of the host organism, which may be a bacterium, plant animal or human.

Eg: Influenza, corona virus, rhino virus.
Pupil teacher will dictate the content briefly via chart.Students will see the charts and then try to relate the points with the chart.

Uses of Microorganisms

1.In Bakery:

The bacterium, Lactobacillus promotes the formation of curd. It multiplies in milk and converts it into curd.

· In making idlis and bhaturas.
· In making of cheese, pickles.
· In making of Bread, pav.
2.Commercial uses:

·  large scale production of alcohol, wine and acetic acid (vinegar).
·  Yeast is used for commercial production of alcohol and wine.
· yeast is grown on natural sugars present in grains like barley, wheat, rice, crushed fruit juices, etc.
3.Medicinal uses:

· Medicines kill or stop the growth of the disease-causing microorganisms.
· Such medicines are called antibiotics.
· antibiotics are being produced from bacteria and fungi.

· Eg: Streptomycin, tetracycline and erythromycin

4.In making Vaccine:

· Several diseases, including cholera, tuberculosis, smallpox and hepatitis can be prevented by vaccination.

5.Increasing soil fertility:

· Some bacteria 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.
6.Cleaning the Environment:
The wastes of plants, vegetables and fruits from nearby houses and gardens , put in a pit meant for waste disposal.

After some time, it decomposed and got converted to manure via microorganisms.
Pupil teacher will dictate the content briefly.Students will note down each and every point and ask queries to the teacher.

Harmful Effects of Microorganisms

Some of the microorganisms cause diseases in human beings, plants and animals. Such disease-causing  microorganisms are called pathogens.
Some microorganisms spoil food, clothing and leather.

1.Disease causing microorganisms:

· Microbial diseases that can spread from an infected person to a healthy person through air, water, food or physical contact are called communicable diseases.

· Examples of such diseases include cholera, common cold, chicken pox and tuberculosis.

· Several microorganisms cause diseases in plants like wheat, rice, potato, sugarcane, orange, apple and others. The diseases reduce the yield of crops
Pupil teacher will dictate the content briefly.Students will note down each and every point.

2.Food Poisoning:

Food poisoning is a result of consumption of food spoiled by some microorganisms that produce substances that are toxic in nature and make the food poisonous and can cause serious illness to living organisms.
Food Preservation

Microorganisms may grow on our food and spoil it. Spoiled food emits bad smell,bad taste and changes colour.
Students will note down each and every point.


Well students, today we have learnt about different types of microorganism, their uses and their harmful effects.


The pupil-teacher evaluates the students by asking some questions:

1. What do you mean by microorganisms?

2. What are the harmful effects of microorganisms?

State right (✔) or wrong (✘)

  1. Protozoan are unicellular organism (    )
  2. Fungi can synthesize its own food (    )
  3. Pathogens are disease causing microorganisms (    )
  4. Bacteria comes under Eukaryotes (    )


  • Write a short note algae?
  • Tabulate the difference between Bacteria and virus?
  • Write the useful and harmful effects of microorganisms?

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