First cell produced on earth is
Protobiont
Protozoa
Metazoa
None of these
Related Questions
The 'hot dilute soup' proposed by Haldane and Oparin as a crucial stage in the origin of life faced a major challenge. What was this primary obstacle?
The absence of a continuous source of energy.
The presence of an oxidizing atmosphere.
The lack of a mechanism to concentrate the organic molecules to facilitate polymerization.
The instability of amino acids at high temperatures.
In the early earth, organic acids were produced by the combination of with
Ammonia and methane
Hydrogen
Organic matter
Sulphates and nitrates
Protocells are considered a key step in the origin of life. Which of the following is NOT a characteristic typically associated with protocells?
Membrane-bound compartments
Simple metabolic activity
Ability to undergo fission
Developed DNA replication mechanisms
What is the significance of coacervates in the origin of life?
They are the first true cells
They demonstrate the potential for membrane-bound structures to form spontaneously
They are self-replicating molecules
They prove that life originated in the ocean
Which is still a favourite idea for some astronomers
Spores
Panspermia
Gamets
Sperms
How did George Cuvier accounts for the extinctions in nature
Extinctions never occur there are unexplored parts of the globe where the organisms that appears to have gone extinct may still live
Extinctions occur when the slow adaptations of the organisms overtime to their environment are not quick enough to help them respond to changing conditions
Extinctions occur at random, they do not reflect God’s will
Extinctions occur due to the catastrophic events
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
The first life on earth consists of
Single-celled prokaryotes
Multicellular eukaryotes
Small mammals
Complex plants
Which of the following was formed in S Miller’s experiment?
Amino acids
Nucleic acids
UV radiations
Microspheres
The first life on earth consists of
Single-celled prokaryotes (bacteria and archaea)
Multicellular eukaryotes (plants and animals)
Viruses
Complex proteins
