The first cell like structure was appeared in
Air
Mountain
Ocean
Soil
Related Questions
Experimental evidence of chemical evolution was given by
Miller
Haldane
Oparin
All of the above
Big-Bang theory attempts to explain the origin of
Earth
Solar-system
Universe
Contenents
Life cannot originate from inorganic materials now because of
Low atmospheric temperature
High degree of pollution
High atmospheric oxygen
Absence of raw materials
The abiogenesis occurred about how many billion years ago?
1.2 billion
1.5 billion
2.5 billion
3.5 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
Which stage in the origin of life is characterized by the aggregation of organic polymers into membrane-bound structures?
Synthesis of organic monomers
Synthesis of organic polymers
Formation of protobionts
Formation of DNA-based genetic systems
The first enzyme on the primitive earth was/were
Proteins
DNA
RNA
Amino acids
The evolution of which metabolic process significantly altered Earth's atmospheric composition?
Chemosynthesis
Fermentation
Photosynthesis
Respiration
The first life on earth consists of
Single-celled prokaryotes (bacteria and archaea)
Multicellular eukaryotes (plants and animals)
Viruses
Complex proteins
Life appeared
500 million years after the formation of earth
600 million years after the formation of earth
Four billion years back
Both (1) and (3)
