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
Related Questions
Which is still a favourite idea for some astronomers
Spores
Panspermia
Gamets
Sperms
Proteinoids are
Carbohydrate structure consisting of branched sugars
Fatty acid structure consisting of branched fatty molecules
Protein structure consisting of branched amino acids
Protein structure consisting of unbranched amino acids
Cosmozoic theory was proposed by
Hermann Richter
Louis Pasteur
Svante Arrhenius
Jöns Jacob Berzelius
First autotrophs on the primitive earth was/were
Aerobic
anaerobic
Both (1) and (2)
Photosynthetic protist
The evolution of which metabolic process significantly altered Earth's atmospheric composition?
Chemosynthesis
Fermentation
Photosynthesis
Respiration
What happened to present in the primary atmosphere during its conversion to the secondary atmosphere?
It got oxidized to and water
It was absorbed by photoautotrophs
Most of it got oxidized to nitrogen oxides
It concentration was decreased due to formation
Oparin and Haldane’s theory is also called
Panspermia Theory
Primordial Soup Theory
Spontaneous Generation Theory
Endosymbiotic Theory
Oparin and Haldane’s theory is also called
Chemical theory of origin of life
Modern theory of origin of life
Naturalistic theory
All of the above
Theory of spontaneous generation or abiogenesis was first disproved by
A R Wallace
Francisco Redi
Louis Pasteur
A I Oparin
The first life on earth consists of
Single-celled prokaryotes (bacteria and archaea)
Multicellular eukaryotes (plants and animals)
Viruses
Complex proteins
