Lakshesh Verma Lakshesh Verma

Lecture 3 : Nitrogen fixation & Nitrogen Cycle

  • MICROORGANISMS : FRIEND AND FOE Assignments 1

    Use of microorganisms in increasing soil fertility.

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  • MICROORGANISMS : FRIEND AND FOE Assignments 2


    Use of microorganisms in cleaning the environment

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  • MICROORGANISMS : FRIEND AND FOE Assignments 3

    what is Nitrogen cycle.

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  • MICROORGANISMS : FRIEND AND FOE Assignments 4

    Disease causing microorganisms in plants

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  • MICROORGANISMS : FRIEND AND FOE Assignments 5

    How can we prevent the following diseases?
    (a) Cholera
    (b) Typhoid
    (c) Hepatitis A

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  • MICROORGANISMS : FRIEND AND FOE Assignments 6

    Give reasons for the following.
    (a) Fresh milk is boiled before consumption while processed milk stored in packets can be consumed without boiling.
    (b) Raw vegetables and fruits are kept in refrigerators whereas jams and pickles can be kept outside.
    (c) Farmers prefer to grow beans and peas in nitrogen deficient soils.
    (d) Mosquitoes can be controlled by preventing stagnation of water though they do not live in water. Why?

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  • MICROORGANISMS : FRIEND AND FOE Assignments 7

    How do vaccines work?

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  • MICROORGANISMS : FRIEND AND FOE Assignments 8

    (a) Name two diseases that are caused by virus.
    (b) Write one important characteristic of virus.

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  • MICROORGANISMS : FRIEND AND FOE Assignments 9

    What will happen to ‘pooris’ and ‘unused kneaded flour’ if they
    are left in the open for a day or two?

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  • MICROORGANISMS : FRIEND AND FOE Assignments 10

    While returning from the school, Boojho ate chaat from a street
    hawker. When he reached home, he felt ill and complained of
    stomach ache and fell ill. What could be the reason?

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    • Description:-

    Lecture 3:
    Today, we will discuss the last two topics, i.e; Nitrogen fixation & Nitrogen Cycle respectively of Chapter 2 Microorganisms : Friend And Foe.
    Objectives:
    1. Basic concept about Nitrogen fixation & cycle.
    Important Tip:
    This lecture is about Nitrogen fixation & Nitrogen Cycle. In this lecture you’ll get to learn about Nitrogen Fixation. Also, you’ll get to learn about the Nitrogen Cycle. Have a clear focus on this topic, it help you in further studies also.
    Please go through the topic, their notes. Properly do the assignments, watch videos of the concerned topics. If you have any doubt about any topic/point please submit it in the discussion section... it will be answered as soon as possible.
    After all of this... when you feel confident about the particular topic/chapter then take the quiz.

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