image

    Have a query? Ask a Tutor!!

    Access to best educators and exclusive paper discussions

    Can’t find what you’re looking for?

    Our tutors are from top schools around the world, and they are waiting for you 24/7, anytime, anywhere.

    • Homework- One to One Solutions
    • Understand concepts to solve better
    • Get your doubts solved instantly
    Biology
    Grade-8
    Easy

    Question

    Which of the following elements were not found in free form during the origin of life?

    1. Methane
    2. Ammonia
    3. Hydrogen
    4. Oxygen

    Hint:

    The oxygen was not present in free form during formation of earth

    The correct answer is: Oxygen

      • Atmospheric of the primitive earth was reducing because the hydrogen atoms was most numerous and most reactive 
      • Large quantity of water  ammonia,  nitrogen,  methane were present 
      • Free oxygen was not present. Hence oxygen was absent during the formation of earth

      Related Questions to study

      Grade-8
      Biology

      These are examples of___________.

      1. Theory of special creation
      2. Theory of chemical evolution
      3. Theory of spontaneous creation
      4. Theory of panspermia

      These are examples of___________.

      BiologyGrade-8
      1. Theory of special creation
      2. Theory of chemical evolution
      3. Theory of spontaneous creation
      4. Theory of panspermia
      Grade-8
      Biology

      _____________ are the first form of life.

      1. Protobionts 
      2. Virus
      3. Bacteria
      4. Amoeba

      _____________ are the first form of life.

      BiologyGrade-8
      1. Protobionts 
      2. Virus
      3. Bacteria
      4. Amoeba
      Grade-8
      Biology

      Match the following:

      1. a-1, b-2, c-3
      2. a-3, b-1, c-2
      3. a-2, b-3, c-1
      4. a-3, b-2, c-1

      Match the following:

      BiologyGrade-8
      1. a-1, b-2, c-3
      2. a-3, b-1, c-2
      3. a-2, b-3, c-1
      4. a-3, b-2, c-1
      parallel
      Grade-8
      Biology

      Earth originated about 4.6 million years ago.

      1. True
      2. False

      Earth originated about 4.6 million years ago.

      BiologyGrade-8
      1. True
      2. False
      Grade-8
      Biology

      Amino acids are essential to every known life form.

      1. True
      2. False

      Amino acids are essential to every known life form.

      BiologyGrade-8
      1. True
      2. False
      Grade-8
      Biology

      Nucleotides are formed due to the reaction between ________, ________ and ___________.

      1. Phosphoric acid, sugar, and nitrogenous bases
      2. Phosphoric acid, sugar, and fatty acids
      3. Phosphoric acid, alcohols, and nitrogenous bases
      4. Glycerol, sugar, and nitrogenous bases

      Nucleotides are formed due to the reaction between ________, ________ and ___________.

      BiologyGrade-8
      1. Phosphoric acid, sugar, and nitrogenous bases
      2. Phosphoric acid, sugar, and fatty acids
      3. Phosphoric acid, alcohols, and nitrogenous bases
      4. Glycerol, sugar, and nitrogenous bases
      parallel
      Grade-8
      Biology

      Which of the following is a simple organic molecule?

      1. Polysaccharides
      2. Fats
      3. Amino acids
      4. Proteins

      Which of the following is a simple organic molecule?

      BiologyGrade-8
      1. Polysaccharides
      2. Fats
      3. Amino acids
      4. Proteins
      Grade-8
      Biology

      Which theory is also known as self-assembly theory?

      1. Theory of special creation
      2. Theory of chemical evolution
      3. Theory of spontaneous creation
      4. Theory of panspermia

      Which theory is also known as self-assembly theory?

      BiologyGrade-8
      1. Theory of special creation
      2. Theory of chemical evolution
      3. Theory of spontaneous creation
      4. Theory of panspermia
      Grade-8
      Biology

      The primitive broth was free of ____________.

      1. Oxygen
      2. Sulfur
      3. Hydrogen
      4. Nitrogen 

      The primitive broth was free of ____________.

      BiologyGrade-8
      1. Oxygen
      2. Sulfur
      3. Hydrogen
      4. Nitrogen 
      parallel
      Grade-8
      Biology

      The big bang theory states that the universe originated about ________ years ago.

      1. 50 billion
      2. 20 billion
      3. 20 million
      4. 100 billion

      The big bang theory states that the universe originated about ________ years ago.

      BiologyGrade-8
      1. 50 billion
      2. 20 billion
      3. 20 million
      4. 100 billion
      Grade-8
      Biology

      Which of the following theories suggests that life originated on earth by combinations of various chemicals through constant chemical reactions over a long period?

      1. Theory of special creation
      2. Theory of chemical evolution
      3. Theory of spontaneous creation
      4. Theory of panspermia

      Which of the following theories suggests that life originated on earth by combinations of various chemicals through constant chemical reactions over a long period?

      BiologyGrade-8
      1. Theory of special creation
      2. Theory of chemical evolution
      3. Theory of spontaneous creation
      4. Theory of panspermia
      Grade-8
      Biology

      Theory of spontaneous generation was disproved by _____________.

      1. Oparin and Haldane
      2. Louis Pasteur
      3. Charles Darwin
      4. Aristotle

      Theory of spontaneous generation was disproved by _____________.

      BiologyGrade-8
      1. Oparin and Haldane
      2. Louis Pasteur
      3. Charles Darwin
      4. Aristotle
      parallel
      Grade-8
      Biology

      The theory of chemical evolution was given by _________.

      1. Oparin and Haldane
      2. Urey and Miller
      3. Darwin and Wallace
      4. Plato and Aristotle

      The theory of chemical evolution was given by _________.

      BiologyGrade-8
      1. Oparin and Haldane
      2. Urey and Miller
      3. Darwin and Wallace
      4. Plato and Aristotle
      Grade-8
      Biology

      The first cell was ______________ in nature.

      1. Autotrophic
      2. Heterotrophic
      3. Aerobic
      4. Chemoheterotrophic

      The first cell was ______________ in nature.

      BiologyGrade-8
      1. Autotrophic
      2. Heterotrophic
      3. Aerobic
      4. Chemoheterotrophic
      Grade-8
      Biology

      Evolution is a ___________ process.

      1. Slow
      2. Fast
      3. Quick
      4. Stochastic

      Evolution is a ___________ process.

      BiologyGrade-8
      1. Slow
      2. Fast
      3. Quick
      4. Stochastic
      parallel

      card img

      With Turito Academy.

      card img

      With Turito Foundation.

      card img

      Get an Expert Advice From Turito.

      Turito Academy

      card img

      With Turito Academy.

      Test Prep

      card img

      With Turito Foundation.