Which is still a favourite idea for some astronomers
Spores
Panspermia
Gamets
Sperms
Related Questions
Which one of the following amino acid was not found to be synthesized in Miller’s experiment?
Glycine
Aspartic acid
Glutamic acid
Alanine
The first non-cellular form of life could have originated
3 billion years back
2 billion years back
4 billion years back
1 billion years back
Which of the following gases was likely NOT abundant in the early Earth's atmosphere?
Methane
Ammonia
Water vapor
Oxygen
The RNA world hypothesis proposes that RNA, not DNA, was the primary genetic material in early life. Which characteristic of RNA makes it a more plausible candidate for this role compared to DNA?
Double-stranded structure
Higher stability
Catalytic activity
Presence of thymine
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 first life on earth consists of
Single-celled prokaryotes (bacteria and archaea)
Multicellular eukaryotes (plants and animals)
Viruses
Complex proteins
Select the wrong statements: I. Swan-neck flask experiment was performed by Louis Pasteur, II. Louis Pasteur is famous for germ theory of disease, III. Louis Pasteur disapproved spontaneous theory forever, IV. Cosmozoic theory of origin of life was proposed by Richter, V. Theory of catastrophism was given by Georges Cuvier. Choose the correct option
I and II
III and IV
I and V
None of the statements are wrong
What did Miller obtained from his experiment?
Amino acid
Organic compounds
Peptide
All of these
Life appeared ________ years after the formation of earth
4.5 billion
1 billion
500 million
2 billion
Which of the following is NOT a key feature of the Oparin-Haldane theory of the origin of life?
Formation of organic monomers from inorganic gases
Presence of free oxygen in the early atmosphere
Polymerization of monomers to form macromolecules
Coacervates as precursors to the first cells
