Microbes Friend and Foe in One Shot | Biology - Class 8th | Umang | Physics Wallah

📝 For complete notes of Lectures, visit Umang Batch in the Batch Section of PhysicsWallah App/Website.
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▶️Complete CLASS 8TH - SCIENCE ONE SHOT Lectures - • Science - Class 8th NCERT
In this lecture of Umang batch, BhagyaShree ma'am is going to teach you the chapter-Microbes Friend and foe.
Topics covered in this lecture are-
•What are microbes?
•Different categories of microbes
•Friendly microbes
•Vaccination
•Microbes in enviroment
•Soil fertility
•Diseases
•Vectors
•Pasteurization
•Nitrogen Fixation
There are many other important chapters that we are going to cover in upcoming videos for class 8. Stay tuned with PhysicsWallah Foundation.
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NOTE: This batch is completely FREE, you just have to click on the "BUY NOW" button for your enrolment.
🔴 Details about the batch -
• Recorded Lectures for Class 8th Students.
• PDF Notes of each Lecture will be available on the PW App.
• Weekly Lecture Planner will be uploaded on PW Foundation Community Page.
• Classes will start from 10th January and we will cover the whole syllabus by 10th March.
🎦 Eight Lectures per week will be uploaded.
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28:26 Fermentation : The process of conversion of sugar into alcohol is known as fermentation.

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In

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No, Fermentation: The process of Turning sugar into Alcohol in the absence of oxygen. By the action of yeast is Called Fermentation.... You missed Some Line bro

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Yeah, But in the absence of oxygen and energy is also formed in this process.

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Because when we leave curd for long time more microorganisms get reproduce as there is more reproduction of lactobacillus curd tastes sour

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Aspergillus produces only citric acid not acetic acid. Acetic acid is produced with the help of a microbe called acetobacter

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Right

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[@brainless5486]

1:14:22 This is for all students. The actual temperature is 70°C. It looks like there was a typo there but the actual temp is 70°C which is also written in our NCERT. Thank you.

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Thank you! :D

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mam do microorganism live in distilled water

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What is the difference between vector and carriers ???

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Vectors are the insects which the bacteria has entered their body then they send by their mouth by biting and carriers are those which carries bacteria or any mico organisms by their legs by wandering from mud to food

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Ma'am in pasteurization milk is heated about 70 deegre not 700 deegre ma'am your explanation and teaching style is amazing and awesome

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Mam in ncert it's written 70 'c in pasteurisation topin milk is boiled

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Mam what ever you write on the board i write it too its just like notes. It helps in my exams. 😊

[@raghavgupt]

1:14:21 it is not 700 degree celsius its upto 70 degree Celsius

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Paramoecium, Euglena, Amoeba and Spirogyra is also part of microorganisms

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PROTOZOA

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The first three are protozoan which mam mentioned and spirogyra is a fungi which also she mentioned!

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​@@uttkarshsingh359 algae*

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Hi

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Paramoecium,euglena and amoeba are protozoa and spirogyra is an algae 👀

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Mam iss chapter ke notes available hain kya ??

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Mam you're written that the milk is heated about 700°C but actually it is heated about 70°C

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1:14:20mam it is hotted at 70 degree Celsius not at 700 degree Celsius

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Yes😂😂😂😂😂😂700.

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1:14:15 Milk is not heated to above 700°C. It is heated above 70°C. 😊😊

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Learn some grammar dear!

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Maths sir joined the chat

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There is a very tiny mistake in this video. In pasteurization milk is heated to about 70 degree Celsius not 700 degree Celsius. Other wise the explanation is great mam, you cleared my all doubts😊

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Ma'am according to NCERT - The milk is heated to about 70 degree celcius for 15 to 30 sec and then suddenly chilled and stored. Called PASTEURISATION

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Check pasteurization temperature

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Does vaccines made against only viruses not to prevent disease against other microbes????

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sed life

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38:06

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28:45 mam toh fir anaerobic respiration aur fermentation ke bich mien difference kya hai?

[@agastyasfiesta5814]

those cells can naturally survive without ANY oxygen whereas anaerobic respiration aids us in lack of oxygen but still limited supply , so ananerobic respiration helps us by excreting lactic acid but fermentation is in bacterias only. jai shree ram

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Pasturisation NCERT BOOK main 70 °C Diya hai. Aapne bola 700°C. 1:15:07

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Tu 70 he padhalay

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Ma'am in pasteurization it's 70°C it's no 700 C

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Yes

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Is yeast is also used for commercial production of alcohol and wine?😊

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Yes, it is used for commercial production of alcohol,beer,wine and acetic acid.🤗 i hope my ans helped you i am also in class 8

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Hlo friends

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Thank you mam now I understand this chapter