Biology - Microorganisms (Introduction to Bacteria) - CBSE Class 8 - Lake Harding Association

Biology – Microorganisms (Introduction to Bacteria) – CBSE Class 8

Biology – Microorganisms (Introduction to Bacteria) – CBSE Class 8

By Micah Moen 36 Comments February 19, 2020


The most special day of the year is our Birthday! And birthday gets with it a delicious birthday cake! But what if cakes were never so delicious and fluffy? Well the fluffiness is all thanks to the YEAST that helps it get spongy! But the yeast is just so tiny! And how can it help us so much? Well, there are several organisms tinier than yeast that help us to obtain many useful products. These little creatures are called MICRO-ORGANISMS! Now as the name says, Micro means very small or microscopic structures, while organisms are living beings. Thus, those organisms which cannot be observed with naked eyes, and require a microscope to be seen, are the Micro-organisms. These tiny creatures come in various shapes, forms, and structures. For studying them, a proper categorisation is really necessary. Thus, we classify these micro-organisms, simply referred to as microbes, in four major classes: Bacteria, Fungi, Protozoa and Algae. Let’s get introduced to each. Let us begin with Bacteria first. They are usually unicellular prokaryotic organisms. What do we mean by this? Unicellular as the name suggests, are made up of single cell . So the entire body of the organism consists of just one cell? Yes! That is how it is! And what do we mean by Prokaryotic? Well, the word arises from two Greek terms. The term “Pro” means “before” that refers to Primitive form. Whereas the term “Karyon” means “kernel or nut” and here it refers to a membrane bound nucleus. So Prokaryotic organisms are those which do not have a proper, well-defined nucleus . As we can see here , in these organisms the genetic material is randomly scattered in the cytoplasm. So when we say that Bacteria are unicellular prokaryotes, it means they have a single cell which is of a primitive type, without a well-defined nucleus. Would studying them be simpler then? Not really! Bacteria, in spite of their unicellular and prokaryotic nature, come in diverse forms. They come in various shapes and sizes, and are present almost everywhere around us. So how do we study so many types? It’s simple! We classify them into categories. Based on their SHAPES, we classify them into four major groups. As we can see here, the spherical ones called Coccus , or plural Cocci. Then these rod-shaped ones called Bacillus or plural Bacilli. Then we have these comma-shaped bacteria called Vibrio , plural Vibrios. And lastly, we have these spiral shaped ones called the Spirillum or plural Spirilla. There are numerous other ways of classifying the bacteria. However, we restrict ourselves to only this one simple type: based on shapes! Now where do you think these bacteria will be found? In isolated places? Or scattered at specific points? Will they be found only on land? Or only in water? Or both? Well there is single word which describes their presence; and that word is “EVERYWHERE ”! Yes! There is no single place on this earth where you won’t find bacteria! May it be the hot springs, or the ice cladded regions. May it be the salty Dead Sea, or even the marshy lands. They are present everywhere! And let me tell you an amazing fact! Some of them are even present inside you! But don’t worry! The ones inside you are like friends! They won’t harm you in any way! Well this was about the various types of bacteria in short. Now we need to take a look at the next category of micro-organisms as well. Let’s talk about Fungi in the next video.

36 Comments found

User

Ayan Rasikh

That's why I was just wondering how i memorized. Thanks mam

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dipankar sarkar

Mam we need more bilogy classes like photosynthesis,respiration etc.

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Nitesh Gheeyal

Nice

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Nitesh Gheeyal

All videos are very creative

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D4RK_ K1NG

so does the bacteria still in air too? so you need a expirement or microscope to to see them?

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anil ratnam

Very nice video

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V.bhanu prasad Goud

Please say about blackholes

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Auriana 2311

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(I want you to tell me how much time it take to type?) comment down πŸ‘‡πŸΎ

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Saksham Gupta

Please try to make more videos but in an order or for specific topics or making videos on more chapters of 8,9,10. You are the only good teacher on YouTube!!

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Abdul Ali

Great explanation

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Rajesh Yadav

I like vvideo

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saurabh thakare

You are a great teacher. Please make more videos on Biology

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halfmantlefull crack

Mam i tried byjus,tutormate,40minschool but you are the best mam of world

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makkahwi yah

Hey really love your explanation but really in a hope to give science explanation for class 11

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makkahwi yah

Please

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Saad Saad

Thank you

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Sapna Suman

What is yeast

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megha Desai

I depend upon your videos
Thanks for all the help
I love your way of explaining and teaching

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megha Desai

I dont know how I just understand everything

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Khushi Panchi

I think you are the best teacher for me
I was just finding a long for just a teacher like you
Thanks teacher you made me take interested in science

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Chitranjan kumar

Explation of nervous tissue is missing

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Muskan Siddikee

Ma'am please upload videos for class 11 science syllabus

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Sabana Parvin

You were never a small team we are all at your support.

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Hephzibah gaikwad

No boring, simple explanation ,interesting and teaching is in short period.πŸ’žπŸ’žπŸ’ž These simple words r printed in a no of pages –called πŸ“– πŸ˜‰.k wt ever it may be I'm a big fan of this channel. PlZ upload more videos.

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Aashi singh Singh

Love it your videos

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Mukunthan Murulidharan

This is a very amazing video,with no mistakes.I think so.

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Ruqaiya Farhat

Please make videos of useful and harmful microbes

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blue mermaid

Please i have a request that please make useful videos on biotechnology and microbiolgy as i am doing masters in biotech and environwmntal studies

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Harish Chikorde

Hyy its really very good in my 1st test I got out of 40 only 28 but in my 2nd test I was seeing ur videos so I got 38/40 thank you very much

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Ayesha Ali Rifaqat

I love DONT MEMORIZE becuz it explains everything so well…
can you plz make a video on Mrs gren (biology)

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jhansi muthum

Super I can understand easily by this video

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Alan Madhav

Make more vedios on microbiology

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Nishit Kumar

Yeast is not used in cakes , yeast is used (mostly) in breads and we use baking soda/powder to make cake fluffy . πŸ˜‚
Anyway love the way you guys make it so so easy and interesting to learn.

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kyara kakun singh

Your voice is really nice. That you so much

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bb

I luv ur vids πŸ‘βœ¨β€οΈ

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Hareesh Pentela

I have studied in the past that the only place where bacteria cannot be found on earth is where a child is in the mothers womb. Only when the child comes out lakhs of bacteria sticks to him near the vagina and that bacteria helps to the broth of good immune system in child, that is why more than a operation, a normal delivery is the best one.

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CUBE SOLVING BY VIKASH

Do bacteria live in my bed sheet

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