Which gas was likely ABSENT in the early Earth's atmosphere according to the Oparin-Haldane hypothesis?
Methane ()
Ammonia ()
Water vapor ()
Oxygen ()
Related Questions
Which of the following is a critical argument against the theory of panspermia related to the origin of life on Earth?
Meteorites have been found to contain organic molecules.
Life on Earth shares a common genetic code.
Microbial life has been found in extreme environments on Earth.
The harsh conditions of space, including radiation and extreme temperatures, would likely destroy any known life forms during interstellar travel.
The abiogenesis occurred about how many billion years ago?
1.2 billion
1.5 billion
2.5 billion
3.5 billion
Life appeared ________ years after the formation of earth
4.5 billion
1 billion
500 million
2 billion
Information molecule to get evolved first on the primitive earth was
Protein
DNA
RNA
All of these
…A… of Russia and …B…. of England proposed that the first form of life could have come from …C… non-living organic molecule. Choose the right option for A, B and C to compete the given NCERT statement
A-Oparin, B-Haldane, C-Post-existing
A-Haldane, B-Oparin, C-Post-existing
A-Oparin, B-Haldane, C-Pre-existing
A-Haldane, B-Oparin, C-Pre-existing
The gases condensed under …A… and formed the galaxies of the present day universe. In the solar system of the milky way galaxy, earth was supposed to have been formed about …B… back. There was no atmosphere …C… on the earth. Water vapour, …D… carbon dioxide and ammonia released from molten mass covered the surface.
Choose the correct option for A, B, C and D to complete the given paragraph with reference to NCERT textbook
A-Gravitation, B-4.5 billion years, C-Early, D-Methane
A-Acceleration, B-4.5 billion years, C-Early, D-Methane
A-Acceleration, B-4.5 billion years, C-Early, D-Ethane
A-Gravitation, B-4.5 billion years, C-Early, D-Ethane
Coacervates were experimentally produced by
Sydney Fox
Oparin and Haldane
Miller and Urey
Spallanzani and Needham
Which of the following best describes the significance of coacervates in the context of the origin of life?
They are fossilized evidence of the earliest life forms on Earth.
They prove that RNA was the primary genetic material in early life.
They demonstrate how membrane-bound compartments, crucial for cellular life, could have arisen spontaneously from organic molecules.
They explain the mechanism by which the first self-replicating molecules were formed.
The sequence of origin of life could be
Organic materials → inorganic materials → colloidal aggregate → eobiont → cell
Inorganic materials → organic materials → colloidal aggregate → eobiont → cell
Inorganic materials → organic materials → eobiont → cell → colloidal aggregate
Organic materials → inorganic materials → eobiont → cell → colloidal aggregate
