Biology
Grade-8
Easy

Question

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

hintHint:

  • Complex organic molecules were made from simple organic molecules .

The correct answer is: Theory of chemical evolution


    • Theory of chemical evolution states that complex organic molecules were made from simple organic compounds by the chemical reactions.
    • The theory was based on the experiment done by Miller and Urey .
    • They made the similar condition as that of early earth by using water, ammonia and hydrogen 
    • On reaction organic molecules were produced 
    • The end products of the reaction was aldehyde and amino acids which are the precursors of nucleic acid.  Hence , complex organic molecules were made from simple molecules by the chemical reactions 

    Related Questions to study

    Grade-8
    Biology

    Theory of spontaneous generation was disproved by _____________.

    Theory of spontaneous generation was disproved by _____________.

    BiologyGrade-8
    Grade-8
    Biology

    The theory of chemical evolution was given by _________.

    The theory of chemical evolution was given by _________.

    BiologyGrade-8
    Grade-8
    Biology

    The first cell was ______________ in nature.

    The first cell was ______________ in nature.

    BiologyGrade-8
    parallel
    Grade-8
    Biology

    Evolution is a ___________ process.

    Evolution is a ___________ process.

    BiologyGrade-8
    Grade-8
    Biology

    Which theory states that life was created by god?

    Which theory states that life was created by god?

    BiologyGrade-8
    Grade-8
    Biology

    BiologyGrade-8
    parallel
    Grade-8
    Biology

    A rotating cloud of hot gases and cosmic dust is called ____________.

    A rotating cloud of hot gases and cosmic dust is called ____________.

    BiologyGrade-8
    Grade-8
    Biology

    Theory of biogenesis was given by__________.

    Theory of biogenesis was given by__________.

    BiologyGrade-8
    Grade-8
    Biology

    __________ is defined as change over time.

    __________ is defined as change over time.

    BiologyGrade-8
    parallel
    Grade-8
    Biology

    Which of the following is FALSE?

    Which of the following is FALSE?

    BiologyGrade-8
    Grade-8
    Biology

    Which of the following is an example of behavioural adaptation:

    Which of the following is an example of behavioural adaptation:

    BiologyGrade-8
    Grade-8
    Biology

    Which of the following is a structural adaptation:

    Which of the following is a structural adaptation:

    BiologyGrade-8
    parallel
    Grade-8
    Biology

    ____________________ is a change in behaviour that comes from experience and is not present in an animal at its birth.

    ____________________ is a change in behaviour that comes from experience and is not present in an animal at its birth.

    BiologyGrade-8
    Grade-8
    Biology

    The following image represents:

    The following image represents:

    BiologyGrade-8
    Grade-8
    Biology

    ___________ is the thick, insulating layer of fat present underneath the skin and helps to keep the body warm.

    ___________ is the thick, insulating layer of fat present underneath the skin and helps to keep the body warm.

    BiologyGrade-8
    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.